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 9 of 12 · sorted by risk, then score
Normal cycle60 on this page · tap one for its risk review
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69404Windows TCP/IP
Elevation of Privilege · Severity Important · CVSS 7
In Windows TCP/IP, 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-2026-69410Windows 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 (KB5122876, KB5123065, KB5123066) for 12 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69413Windows USB Audio Class driver (usbaudio.sys)
Elevation of Privilege · Severity Important · CVSS 7
In Windows USB Audio Class driver (usbaudio.sys), 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-2026-69422Windows 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 unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5124008, KB5124012) for 8 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69430Windows Embedded Mode Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Embedded Mode 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69440Windows MIDI Service Module Elevation of Privileges Vulnerability
Elevation of Privilege · Severity Important · CVSS 7
In Windows MIDI Service Module Elevation of Privileges Vulnerability, 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-2026-69441Windows Installer
Elevation of Privilege · Severity Important · CVSS 7
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-2026-69448Windows 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, KB5122878, KB5122880) for 18 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69468Windows Volume Manager Extension Driver
Elevation of Privilege · Severity Important · CVSS 7
In Windows Volume Manager Extension 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 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69472Windows Devices Human Interface
Elevation of Privilege · Severity Important · CVSS 7
In Windows Devices Human Interface, 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69488Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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 28 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 9, 2026
CVE-2026-69492Windows Partition Management Driver
Elevation of Privilege · Severity Important · CVSS 7 · Out of band
In Windows Partition Management 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-2026-69500Windows 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 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-2026-69516Connected Devices Platform Service (Cdpsvc)
Elevation of Privilege · Severity Important · CVSS 7
In Connected Devices Platform Service (Cdpsvc), 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-2026-69517Windows Wireless Networking
Elevation of Privilege · Severity Important · CVSS 7
In Windows Wireless Networking, 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-2026-69540Windows 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 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69549Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability
Elevation of Privilege · Severity Important · CVSS 7
In Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability, 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-2026-69560Windows Work Folder Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Work Folder 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69563Windows Program Compatibility Assistant Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Program Compatibility Assistant 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69564Windows Online Certificate Status Protocol (OCSP)
Elevation of Privilege · Severity Important · CVSS 7
In Windows Online Certificate Status Protocol (OCSP), 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-2026-69567Windows 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, KB5122876, KB5122878) for 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69573Windows Universal Disk Format File System Driver (UDFS)
Elevation of Privilege · Severity Important · CVSS 7
In Windows Universal Disk Format File System Driver (UDFS), 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-2026-69574Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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-2026-69575Windows Storage Spaces Controller
Elevation of Privilege · Severity Important · CVSS 7
In Windows Storage Spaces Controller, 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69578Windows Kernel
Elevation of Privilege · Severity Important · CVSS 7
In Windows Kernel, 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-2026-69581Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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 28 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69606Windows 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-2026-69610Windows 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 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-2026-69611Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability
Elevation of Privilege · Severity Important · CVSS 7
In Virtual Hard Disk (VHD) Miniport Driver Elevation of Privilege Vulernability, 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-2026-69613Windows 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-2026-69617Windows Resilient File System (ReFS)
Elevation of Privilege · Severity Important · CVSS 7
In Windows Resilient File System (ReFS), 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, KB5124012) for 4 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69621Role: Windows Fax Service
Elevation of Privilege · Severity Important · CVSS 7
In Role: Windows Fax 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-2026-69630Windows 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 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-2026-69645Windows Message Queuing
Elevation of Privilege · Severity Important · CVSS 7
In Windows Message Queuing, 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-2026-69648Windows Notification
Elevation of Privilege · Severity Important · CVSS 7
In Windows Notification, 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-2026-69652Windows 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 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-2026-69654Windows Accounts Control
Elevation of Privilege · Severity Important · CVSS 7
In Windows Accounts Control, 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-2026-69682Windows Host Guardian Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Host Guardian 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-2026-69692Windows 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 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69693Windows Device Association Broker Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association Broker 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69694Windows IP Address Management (IPAM) Service
Elevation of Privilege · Severity Important · CVSS 7 · EPSS 0.03
In Windows IP Address Management (IPAM) 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". EPSS score 0.03, the modelled probability of exploitation activity in the next 30 days. 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-2026-69708Windows Web Platform Storage
Elevation of Privilege · Severity Important · CVSS 7
In Windows Web Platform Storage, 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-2026-69711Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69735Windows Broadcast DVR User Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Broadcast DVR User 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 (KB5122876, KB5122878, KB5122880) for 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69791Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69814Windows Credential Providers
Elevation of Privilege · Severity Important · CVSS 7
In Windows Credential Providers, 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-2026-69816Windows Accounts Control
Elevation of Privilege · Severity Important · CVSS 7
In Windows Accounts Control, 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-2026-69817Windows Bluetooth Port Driver
Elevation of Privilege · Severity Important · CVSS 7
In Windows Bluetooth Port 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 30 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69818Windows 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 unlikely". Fixed in the September 2026 Windows security update (KB5122871, KB5124008, KB5124012) for 8 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69834Windows ALPC
Elevation of Privilege · Severity Important · CVSS 7
In Windows ALPC, 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-2026-69838Windows 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 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-2026-69859Windows USB Audio Class driver (usbaudio.sys)
Elevation of Privilege · Severity Important · CVSS 7
In Windows USB Audio Class driver (usbaudio.sys), 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-2026-69866Windows Device Association Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Device Association 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 22 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-69889Windows 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-2026-69891Windows Media
Elevation of Privilege · Severity Important · CVSS 7
In Windows Media, 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 26 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-70283Windows 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-2026-70565Windows AF_UNIX Socket Provider
Elevation of Privilege · Severity Important · CVSS 7
In Windows AF_UNIX Socket Provider, 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-2026-70567Windows Display Enhancement Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Display Enhancement 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, KB5124008, KB5124012) for 8 supported Windows versions; a restart is required.
- Normal cycleWindowsSeptember 8, 2026
CVE-2026-70568Windows Defender Firewall Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Defender Firewall 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-2026-70573Windows Biometric Service
Elevation of Privilege · Severity Important · CVSS 7
In Windows Biometric 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 26 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.