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Recorded 5 Nov 2026 at 22:41 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position. See the latest record.

Windows updateMicrosoft release information, MSRC and Windows release health

KB5066835

Windows 11, version 24H2: KB5066835 · 2025-10 B · OS build 26100.6899

What it said

KB
KB5066835
Windows versions and builds
Windows 11, version 24H2: 26100.6899 (2025-10 B); Windows 11, version 25H2: 26200.6899 (2025-10 B); Windows Server 2025: 26100.6899 (2025-10 B)
Applies to
Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2025
Restart required
Not stated in collected security fixes
CVEs fixed
Unknown: security evidence or the required release is incomplete
Known issues affecting this update
Unknown: known-issue evidence is incomplete or retained
Known issues resolved
Unknown: known-issue evidence is incomplete or retained
Included security update
None identified in the collected release tables
CVEs listed directly for this KB
Unknown: security evidence or the required release is incomplete
Missing security release
October 2025
Published
14 Oct 2025 00:00 UTC
Known issues caused
None in the collected release health data

Source evidence when recorded

Windows 11 releases
IncompleteRead 5 Nov 2026 at 21:12 UTC
Windows Server releases
IncompleteRead 5 Nov 2026 at 21:12 UTC
Microsoft security releases
Complete at observationRead 5 Nov 2026 at 22:34 UTC
Windows known issues
IncompleteRead 5 Nov 2026 at 22:34 UTC

Coverage describes the sources at this observation. A complete read then does not establish their current position.

What changed

  1. Issues resolved: None in the collected release health data → Unknown: known-issue evidence is incomplete or retained · Known issues: None in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  2. Known issues: None in the collected release health data
  3. Applies to: Windows Server 2025 → Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2025
  4. Applies to: Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2025 → Windows Server 2025
  5. Issues resolved: Unknown: known-issue evidence is incomplete or retained → None in the collected release health data · Known issues: Unknown: known-issue evidence is incomplete or retained → None in the collected release health data
  6. Issues resolved: None in the collected release health data → Unknown: known-issue evidence is incomplete or retained · Known issues: None in the collected release health data → Unknown: known-issue evidence is incomplete or retained
Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version
Field-level log (33)

Up to 100 recent field edits are shown; older edits may be outside retention.

  1. 5 Nov 2026 · 22:41:52 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  2. 5 Nov 2026 · 22:41:52 UTC Known issues affecting this updateNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  3. 5 Nov 2026 · 22:41:52 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  4. 5 Nov 2026 · 22:41:52 UTC Source coverage: windows-server-releasesCurrent → Incomplete
  5. 5 Nov 2026 · 22:41:52 UTC Source coverage: windows-11-releasesCurrent → Incomplete
  6. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  7. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  8. 29 Oct 2026 · 20:19:26 UTC Known issues affecting this updateNone in the collected release health data
  9. 28 Oct 2026 · 13:54:09 UTC Source coverage: windows-server-releasesIncomplete → Current
  10. 28 Oct 2026 · 08:37:56 UTC Applies toWindows Server 2025 → Windows 11, version 24H2, Windows 11, version 25H2, Windows Server 2025
  11. 28 Oct 2026 · 08:37:56 UTC Windows versions and buildsWindows Server 2025: 26100.6899 (2025-10 B) → Windows 11, version 24H2: 26100.6899 (2025-10 B); Windows 11, version 25H2: 26200.6899 (2025-10 B); Windows Server 2025: 26100.6899 (2025-10 B)
  12. 28 Oct 2026 · 08:37:56 UTC Source coverage: windows-server-releasesCurrent → Incomplete
  13. 28 Oct 2026 · 08:37:56 UTC Source coverage: windows-11-releasesCurrent
  14. 28 Oct 2026 · 08:37:56 UTC Link: Support articlehttps://support.microsoft.com/topic/october-14-2025-kb5066835-os-build-26100-6899-6cdcc1c3-cfbf-41a3-8f0d-0c4a9d2b7d1e → https://support.microsoft.com/help/5066835
  15. 28 Oct 2026 · 08:37:56 UTC SummaryWindows Server 2025: KB5066835 · 2025-10 B · OS build 26100.6899 → Windows 11, version 24H2: KB5066835 · 2025-10 B · OS build 26100.6899
  16. 26 Oct 2026 · 06:24:14 UTC Applies toWindows 11, version 24H2, Windows 11, version 25H2, Windows Server 2025 → Windows Server 2025
  17. 26 Oct 2026 · 06:24:14 UTC Windows versions and buildsWindows 11, version 24H2: 26100.6899 (2025-10 B); Windows 11, version 25H2: 26200.6899 (2025-10 B); Windows Server 2025: 26100.6899 (2025-10 B) → Windows Server 2025: 26100.6899 (2025-10 B)
  18. 26 Oct 2026 · 06:24:14 UTC Source coverage: windows-11-releasesCurrent → Not collected
  19. 26 Oct 2026 · 06:24:14 UTC Link: Support articlehttps://support.microsoft.com/help/5066835 → https://support.microsoft.com/topic/october-14-2025-kb5066835-os-build-26100-6899-6cdcc1c3-cfbf-41a3-8f0d-0c4a9d2b7d1e
  20. 26 Oct 2026 · 06:24:14 UTC SummaryWindows 11, version 24H2: KB5066835 · 2025-10 B · OS build 26100.6899 → Windows Server 2025: KB5066835 · 2025-10 B · OS build 26100.6899
  21. 23 Oct 2026 · 09:33:49 UTC Known issues resolvedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  22. 23 Oct 2026 · 09:33:49 UTC Known issues causedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  23. 23 Oct 2026 · 09:33:49 UTC Source coverage: windows-known-issuesIncomplete → Current
  24. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  25. 23 Oct 2026 · 09:33:49 UTC Source coverage: windows-server-releasesIncomplete → Current
  26. 23 Oct 2026 · 09:33:49 UTC Source coverage: windows-11-releasesIncomplete → Current
  27. 23 Oct 2026 · 08:31:50 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  28. 23 Oct 2026 · 08:31:50 UTC Known issues causedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  29. 23 Oct 2026 · 08:31:50 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  30. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  31. 23 Oct 2026 · 08:31:50 UTC Source coverage: windows-server-releasesCurrent → Incomplete
  32. 23 Oct 2026 · 08:31:50 UTC Source coverage: windows-11-releasesCurrent → Incomplete
  33. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

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Sources read 11 Nov 15:16 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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