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Microsoft Windows 10 KB5066791 cumulative update

Security Patch Release
First reported
Last updated
Happening score
H score 33
1 unique sources, 1 articles

Summary

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Microsoft released Windows 10 KB5066791, the final cumulative update for Windows 10, as the operating system reached end of support on October 14, 2025. The mandatory patch bundles Microsoft's October 2025 Patch Tuesday fixes, including six zero-day vulnerabilities and 172 other flaws. Eligible customers can continue with extended security updates rather than receiving free security fixes.

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Timeline

  1. 14.10.2025 22:07 2 articles · 9mo ago

    Windows 10 KB5066791 final cumulative update released

    Mitigation Patch Update

    Microsoft released the mandatory Windows 10 KB5066791 cumulative update on October 14, 2025 as Windows 10 reached end of support, ending free Windows Update security fixes and technical assistance for the operating system. The release is the final cumulative update for Windows 10, and eligible customers can continue coverage through extended security updates, with consumers able to enroll for up to 1 year and enterprises for up to 3 years.

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  2. 14.10.2025 22:07 1 articles · 9mo ago

    KB5066791 fixes and installation options detailed

    Technical Analysis Update

    The KB5066791 servicing release delivers Microsoft's October 2025 Patch Tuesday fixes, addressing six zero-day vulnerabilities and 172 other flaws, and it updates Windows 10 22H2 to build 19045.6456 and Windows 10 21H2 to build 19044.6456 after installation. The update also fixes PowerShell Remoting and WinRM command timeouts, resolves SMBv1 connectivity problems after KB5065429, addresses a Windows Autopilot Enrollment Status Page issue during OOBE, and can be installed through Windows Update or the Microsoft Update Catalog.

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