Microsoft has released Windows 10 KB5099539, an extended security update that delivers the July 2026 Patch Tuesday fixes for 570 vulnerabilities, including two exploited zero-days and one publicly disclosed zero-day. The update also brings security hardening changes, bug fixes, and support for Windows 10 devices enrolled in ESU through October 12, 2027. #Windows10 #KB5099539 #PatchTuesday
Keypoints
- KB5099539 adds the July 2026 security updates for Windows 10.
- The update addresses 570 vulnerabilities, including three zero-day flaws.
- Microsoft has extended free Windows 10 ESU support for consumers until October 12, 2027.
- The patch fixes known issues in OLE Automation, File Explorer, and the Recycle Bin.
- It also introduces Secure Boot updates, TDI transport hardening, and new RDP certificate guidance.