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Windows 11 KB5066835 and KB5066793 October 2025 Patch Tuesday

Security Patch Release
First reported
Last updated
Happening score
H score 34
1 unique sources, 1 articles

Summary

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Microsoft released Windows 11 KB5066835 and KB5066793 as the October 2025 Patch Tuesday cumulative updates for 25H2/24H2 and 23H2, fixing security vulnerabilities and OS issues. The updates are mandatory and bring the same fixes across 25H2 and 24H2, with no exclusive changes for the first 25H2 Patch Tuesday release. Users can install them through Windows Update or the Microsoft Update Catalog, and Windows 11 23H2 is nearing end of support in November 2025.

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Timeline

  1. 14.10.2025 20:46 2 articles · 7mo ago

    Microsoft releases Windows 11 KB5066835 and KB5066793

    Initial Disclosure

    Microsoft released Windows 11 KB5066835 and KB5066793 for versions 25H2/24H2 and 23H2 as October 2025 Patch Tuesday cumulative updates, making installation mandatory through Windows Update or the Microsoft Update Catalog. The updates fix security vulnerabilities and several Windows 11 issues, change build numbers to 26200.6899, 26100.6899, and 226x1.6050, and leave a known issue affecting protected-content playback in some Digital TV and Blu-ray/DVD apps.

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