Mac · Apple · released July 27, 2026
Apple macOS security updates, July 27, 2026: every vulnerability, rated
Apple fixed 199 macOS vulnerabilities on July 27, 2026, in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8. None was reported as exploited when it was published. 72 involve running code, kernel or root privileges, a sandbox escape or a remote attacker, so they belong in this week's work. Macs on older macOS versions only get some of these fixes; Apple's own guidance is that not every security issue is fixed in previous major versions.
- CVEs
- 199
- Patch now
- 0
- This week
- 72
- Normal cycle
- 73
- Low
- 54
Fixed in: macOS Tahoe 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8Apple security notes Apple security notes Apple security notes
Page 4 of 4 · sorted by risk, then score
Low19 on this page · tap one for its risk review
- LowMacJuly 27, 2026
CVE-2026-64694Disk Images
In Disk Images: An app may be able to cause unexpected system termination. Apple's fix: An integer overflow was addressed with improved input validation. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64696SMB
In SMB: Connecting to a malicious SMB server may lead to unexpected system termination. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64700Kernel
In Kernel: An app may be able to cause unexpected system termination. Apple's fix: A use after free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64703WebDAV
In WebDAV: An app may be able to cause a denial-of-service. Apple's fix: A use after free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64704SMB
In SMB: An app may be able to cause unexpected system termination. Apple's fix: A type confusion issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64714ImageIO
In ImageIO: Processing a maliciously crafted image may lead to a denial-of-service. Apple's fix: A memory corruption issue was addressed with improved bounds checking. Fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8 and macOS Golden Gate 27.
- LowMacJuly 27, 2026
CVE-2026-64720Kernel
In Kernel: An app may be able to cause unexpected system termination. Apple's fix: A race condition was addressed with improved state handling. Fixed in macOS Tahoe 26.6.
- LowMacJuly 27, 2026
CVE-2026-64724mDNSResponder
In mDNSResponder: An attacker on the local network may be able to cause a denial-of-service. Apple's fix: The issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64725Audio
In Audio: An app may be able to cause a denial-of-service. Apple's fix: An out-of-bounds write issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64727Kernel
In Kernel: An app may be able to cause unexpected system termination. Apple's fix: A type confusion issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6.
- LowMacJuly 27, 2026
CVE-2026-64729Kernel
In Kernel: An app may be able to cause unexpected system termination. Apple's fix: A use after free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6.
- LowMacJuly 27, 2026
CVE-2026-64739Libnotify
In Libnotify: An attacker may be able to cause unexpected app termination. Apple's fix: An out-of-bounds write issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64754ImageIO
In ImageIO: Processing a maliciously crafted file may lead to a denial-of-service. Apple's fix: An out-of-bounds write issue was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64758ImageIO
In ImageIO: Processing a maliciously crafted file may lead to unexpected app termination. Apple's fix: The issue was addressed with improved bounds checks. Fixed in macOS Tahoe 26.6 and macOS Sequoia 15.8.
- LowMacJuly 27, 2026
CVE-2026-64762AVEVideoEncoder
In AVEVideoEncoder: An app may be able to cause unexpected system termination. Apple's fix: An out-of-bounds read was addressed with improved bounds checking. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-64775Kernel
In Kernel: An app may be able to cause unexpected system termination. Apple's fix: A memory initialization issue was addressed with improved memory handling. Fixed in macOS Tahoe 26.6, macOS Sequoia 15.7.8 and macOS Sonoma 14.8.8.
- LowMacJuly 27, 2026
CVE-2026-65375WebDAV
In WebDAV: An app may be able to cause unexpected system termination. Apple's fix: The issue was addressed with improved authentication. Fixed in macOS Tahoe 26.6, macOS Golden Gate 27 and macOS Sequoia 15.8.
- LowMacJuly 27, 2026
CVE-2026-65407AppleAVD
In AppleAVD: An app may be able to cause unexpected system termination. Apple's fix: A use after free issue was addressed with improved memory management. Fixed in macOS Tahoe 26.6, macOS Golden Gate 27, macOS Tahoe 26.7 and macOS Sequoia 15.8.
- LowMacJuly 27, 2026
CVE-2026-84489CoreUI
In CoreUI: An app may be able to cause a denial of service. Apple's fix: A buffer overflow was addressed with improved bounds checking. Fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8 and macOS Golden Gate 27.
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.