Windows · Microsoft · released September 8, 2026
Windows security updates, September 2026: every vulnerability, rated
Microsoft published 705 Windows vulnerabilities in September 2026, most of them on Patch Tuesday, September 8, 2026. 71 are rated Critical. 1 was already being exploited, so it goes to the top of the list. 119 more deserve attention this week; 585 can follow the normal monthly rollout. 27 were fixed by an earlier update and only disclosed this month, so a PC that is already current is covered. The updates that carry these fixes need a restart.
- CVEs
- 705
- Patch now
- 1
- This week
- 119
- Normal cycle
- 543
- Low
- 42
Fixed in: September 2026 Windows security update restart requiredMicrosoft release notes
Page 8 of 12 · sorted by risk, then score
Normal cycle60 on this page · tap one for its risk review
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77501Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77502Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77886Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77888Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation unlikely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77889Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation unlikely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77890Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation unlikely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77893Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-77895Windows DHCP Server
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows DHCP Server, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-83989Windows Services for NFS ONCRPC XDR Driver
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows Services for NFS ONCRPC XDR Driver, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation less likely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-84001Windows Key Distribution Center
Denial of Service · Severity Important · CVSS 7.5 · EPSS 0.01
In Windows Key Distribution Center, an attacker with no account could crash or stall the affected service over the network without anyone clicking anything. Microsoft severity Important, CVSS 7.5. Microsoft rates it "exploitation unlikely". EPSS score 0.01, the modelled probability of exploitation activity in the next 30 days. Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69347Windows Fast FAT Driver
Remote Code Execution · Severity Important · CVSS 7.4
In Windows Fast FAT Driver, an attacker with no account could run their own code once they can run code on the PC. Microsoft severity Important, CVSS 7.4. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68835Windows Print Spooler Components
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows Print Spooler Components, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68889Microsoft Standard XPS
Elevation of Privilege · Severity Important · CVSS 7.1
In Microsoft Standard XPS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68893Remote Desktop Licensing Service
Elevation of Privilege · Severity Important · CVSS 7.1
In Remote Desktop Licensing Service, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69272Microsoft Standard XPS
Elevation of Privilege · Severity Important · CVSS 7.1
In Microsoft Standard XPS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69296Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows Device Association Service, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69313Microsoft Standard XPS
Elevation of Privilege · Severity Important · CVSS 7.1
In Microsoft Standard XPS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69336Microsoft Standard XPS
Elevation of Privilege · Severity Important · CVSS 7.1
In Microsoft Standard XPS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69338Remote Desktop Gateway Service
Elevation of Privilege · Severity Important · CVSS 7.1
In Remote Desktop Gateway Service, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69340Windows NTFS
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows NTFS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69357Windows NDIS
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows NDIS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 24 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69358Remote Desktop Client
Remote Code Execution · Severity Important · CVSS 7.1
In Remote Desktop Client, an attacker with an ordinary user account could run their own code over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69384Virtual Hard Disk (VHD) Miniport Driver
Denial of Service · Severity Important · CVSS 7.1
In Virtual Hard Disk (VHD) Miniport Driver, an attacker with no account could crash or stall the affected service once they can run code on the PC. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69396Windows NDIS
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows NDIS, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69482Windows Error Reporting
Tampering · Severity Important · CVSS 7.1
In Windows Error Reporting, an attacker with an ordinary user account could change data or settings they shouldn't control once they can run code on the PC. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69553Windows Hyper-V
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows Hyper-V, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69597Windows HTTP.sys
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows HTTP.sys, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122880, KB5124008) for 10 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69602Windows PrintWorkflowUserSvc
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows PrintWorkflowUserSvc, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69688Windows Encrypting File System (EFS)
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows Encrypting File System (EFS), an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69706Windows Win32k
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows Win32k, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69761Windows TCP/IP
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows TCP/IP, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69775Windows DWM Core Library
Elevation of Privilege · Severity Important · CVSS 7.1
In Windows DWM Core Library, an attacker with an ordinary user account could take higher privileges over the network, but only if someone opens a file, link or message. Microsoft severity Important, CVSS 7.1. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122880) for 4 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-50349Windows Ancillary Function Driver for WinSock
Elevation of Privilege · Severity Important · CVSS 7
In Windows Ancillary Function Driver for WinSock, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 30, 2026
CVE-2026-61938Windows Installer
Elevation of Privilege · Severity Important · CVSS 7 · Fixed earlier (August 2026)
In Windows Installer, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Microsoft disclosed it on September 30, 2026, but the fix had already shipped in the August 2026 Windows security update (KB5120228, KB5120233, KB5120994) for 8 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 29, 2026
CVE-2026-62694Windows Installer
Elevation of Privilege · Severity Important · CVSS 7 · Out of band
In Windows Installer, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68824Connected User Experiences and Telemetry
Elevation of Privilege · Severity Important · CVSS 7
In Connected User Experiences and Telemetry, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122878, KB5122880) for 18 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68837Windows File History Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows File History Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122876, KB5122878, KB5122880) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68847Connected User Experiences and Telemetry
Elevation of Privilege · Severity Important · CVSS 7
In Connected User Experiences and Telemetry, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122878, KB5122880) for 17 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-68897Microsoft Standard XPS
Elevation of Privilege · Severity Important · CVSS 7
In Microsoft Standard XPS, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69275Kernel Streaming WOW Thunk Service Driver
Elevation of Privilege · Severity Important · CVSS 7
In Kernel Streaming WOW Thunk Service Driver, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69279Windows Cloud Files Mini Filter Driver
Elevation of Privilege · Severity Important · CVSS 7
In Windows Cloud Files Mini Filter Driver, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69280Windows Push Notifications
Elevation of Privilege · Severity Important · CVSS 7
In Windows Push Notifications, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69281Windows License Manager
Elevation of Privilege · Severity Important · CVSS 7
In Windows License Manager, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69287Windows Remote Desktop Services
Elevation of Privilege · Severity Important · CVSS 7
In Windows Remote Desktop Services, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69292Remote Desktop Gateway Service
Elevation of Privilege · Severity Important · CVSS 7
In Remote Desktop Gateway Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122882) for 16 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69299Microsoft COM for Windows
Elevation of Privilege · Severity Important · CVSS 7
In Microsoft COM for Windows, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122878, KB5122880) for 18 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69300Windows Push Notifications
Elevation of Privilege · Severity Important · CVSS 7
In Windows Push Notifications, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122880, KB5122882) for 12 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69309Windows Print Spooler Components
Elevation of Privilege · Severity Important · CVSS 7
In Windows Print Spooler Components, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69311Windows Audio Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Audio Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 28 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69319Windows USB Video Driver
Elevation of Privilege · Severity Important · CVSS 7
In Windows USB Video Driver, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69331Windows Remote Access Connection Manager
Elevation of Privilege · Severity Important · CVSS 7
In Windows Remote Access Connection Manager, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 28 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69333Windows Win32k
Elevation of Privilege · Severity Important · CVSS 7
In Windows Win32k, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5124008, KB5124012) for 6 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69335Windows Win32k
Elevation of Privilege · Severity Important · CVSS 7
In Windows Win32k, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69341Windows Image Acquisition
Elevation of Privilege · Severity Important · CVSS 7
In Windows Image Acquisition, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69362Windows Error Reporting
Elevation of Privilege · Severity Important · CVSS 7
In Windows Error Reporting, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69379Windows NTFS
Elevation of Privilege · Severity Important · CVSS 7
In Windows NTFS, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5122880, KB5124008) for 10 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69383Windows Shell
Elevation of Privilege · Severity Important · CVSS 7
In Windows Shell, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122880, KB5124008) for 10 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69388Windows Bluetooth Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Bluetooth Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69394Windows Audio Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Audio Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69398Windows Bluetooth Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Bluetooth Service, an attacker with an ordinary user account could take higher privileges once they can run code on the PC. Microsoft severity Important, CVSS 7.0. Microsoft rates it "exploitation less likely". Fixed in the September 2026 Windows security update (KB5122871, KB5122876, KB5122878) for 22 supported Windows versions; a restart is required.
Why an MSP manages this
Reading the list is the easy part
Nobody running a business reads all of them, and nobody should have to. The work is deciding which ones matter today, testing the fixes, getting them onto every PC and Mac without breaking the workday, and proving it was done.
- 01
Triage that starts with the exploited ones
Most of these fixes can ride the normal monthly rollout. A handful need action the same day. Telling them apart, every month, on every machine, is the core of the work, and it is the part an office manager rarely has time for.
- 02
Testing before everyone gets it
Updates go to a test ring and a pilot group first, so a broken accounting package or design tool shows up on two machines instead of forty, and the rollout pauses until it is sorted.
- 03
Restarts that don't wreck the workday
Windows updates usually need a restart and macOS updates often do. Deadlines, maintenance windows and grace periods get the fix installed without forcing a reboot in the middle of a client call.
- 04
Macs managed as seriously as PCs
Windows patching tools don't patch Macs. macOS updates need their own install-by deadlines through device management, and major upgrades need the same compatibility testing a Windows feature update gets.
- 05
A plan for machines that can't update
Hardware that ages out and versions past end of support stop getting every fix. They need a decision, isolate, upgrade or replace, before they become the easiest way in.
- 06
Proof when someone asks
Cyber insurance applications, customer security questionnaires and frameworks such as the FTC Safeguards Rule all ask how you keep systems patched. A managed service keeps the inventory and the reports that answer them.
The ins and outs
What keeping Windows and Mac patched actually involves
Windows
Patch Tuesday, and the exceptions
Microsoft ships security updates on the second Tuesday of each month, and out of band when something can't wait. This log marks the out-of-band ones.
Cumulative updates
Each month's Windows update carries the earlier months' fixes, so a PC that missed one catches up with the next, as long as it actually installs.
Fixed first, announced later
Some fixes ship before the vulnerability is disclosed. This log flags them, because a PC that is already current is already covered.
Rings, deferrals and deadlines
Windows Update for Business and Intune let you delay updates for a test group, set an install-by deadline and give a grace period before a forced restart.
Known Issue Rollback and safeguard holds
Microsoft can quietly roll back a change that breaks something, and holds back feature updates from PCs it knows will have trouble. Both explain why two PCs on the same network can be on different builds.
Feature updates and end of support
Each Windows version is serviced for a fixed period. Windows 10 PCs past end of support only get security fixes through the paid Extended Security Updates program.
Mac
No fixed release day
Apple publishes security updates when they are ready, often several times a month around a major release, so Mac patching runs on alerts, not a calendar.
Updates versus upgrades
A point update (26.7 to 26.7.1) fixes problems. A major upgrade (Tahoe to Golden Gate) changes the system and needs the same app testing as a Windows feature update.
Older versions get some fixes, not all
Apple's deployment guide says not every security issue is fixed in previous major versions. Staying a version behind is a choice with a cost, not a safe default.
Install-by deadlines through device management
Without enforcement, a macOS update prompt can be put off again and again. Device management can set a deadline so the update installs on schedule.
Macs that age out
When a Mac can no longer run a current macOS version, it stops getting the full set of fixes. Inventory by model and macOS version shows which ones are next.
Apple Business for zero-touch setup
New Macs enrolled through Apple Business arrive already managed, so update policy applies from the first login instead of after someone remembers to enroll them.
Both platforms
Third-party apps aren't on these lists
Browsers, PDF readers, accounting software, VPN clients and plug-ins patch on their own schedules. A machine can be current on Windows or macOS and still exposed through an app.
Firmware and drivers
BIOS and UEFI firmware, docks and network gear get security fixes too, and they rarely update themselves.
Recovery keys before big changes
Before a feature update or a major macOS upgrade, confirm BitLocker and FileVault recovery keys are escrowed somewhere you can reach.
Laptops that are rarely in the office
Remote and travelling staff need updates delivered over the internet with the same deadlines as office machines, or they drift months behind.
You can't patch what you can't see
An up-to-date inventory of every PC and Mac, with its version and last update, is what turns a list like this one into a finished job.