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KB5123287

Security update fixing 10 CVEs

Support article Update Catalog CVEs in Security CVE list for a ticket
10CVEs fixed · 1 critical
0Exploited or in CISA KEV

No known issues affecting this update, or resolved by it, were identified in the collected Windows release health data.

Security fixes

10 Microsoft CVEs · most urgent first
CVE Vulnerability Severity CVSSEPSSImpact Status
CVE-2026-66302 Skype for Business Remote Code Execution VulnerabilitySkype for Business Critical 9.81.0%RCENetwork
CVE-2026-69646 Skype for Business Spoofing VulnerabilitySkype for Business Important 8.30.3%SpoofingAdjacent
CVE-2026-66304 Skype for Business Information Disclosure VulnerabilitySkype for Business Important 7.51.0%Information DisclosureNetwork
CVE-2026-66307 Skype for Business and Lync Denial of Service VulnerabilitySkype for Business Important 7.51.2%DoSNetwork
CVE-2026-66305 Skype for Business Spoofing VulnerabilitySkype for Business Important 7.10.5%SpoofingNetwork
CVE-2026-63523 Skype for Business Spoofing VulnerabilitySkype for Business Important 6.50.6%SpoofingNetwork
CVE-2026-66303 Skype for Business and Lync Denial of Service VulnerabilitySkype for Business Important 6.51.1%DoSNetwork
CVE-2026-66306 Skype for Business Information Disclosure VulnerabilitySkype for Business Important 6.50.9%Information DisclosureNetwork
CVE-2026-66308 Skype for Business and Lync Denial of Service VulnerabilitySkype for Business Important 6.51.1%DoSNetwork
CVE-2026-69642 Skype for Business Spoofing VulnerabilitySkype for Business Important 6.50.4%SpoofingNetwork

What changed

  1. 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
  2. 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
  3. 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
  4. 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
  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
  7. Applies to: Skype for Business Server Subscription Edition CU1 → Skype for Business Server 2019 CU8, Skype for Business Server Subscription Edition CU1
  8. Known issues: None in the collected release health data
  9. 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
  10. 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

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Cite this version
Field-level log (47)

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

  1. 7 Nov 2026 · 13:11:22 UTC Known issues resolvedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  2. 7 Nov 2026 · 13:11:22 UTC Known issues affecting this updateUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  3. 7 Nov 2026 · 13:11:22 UTC Source coverage: windows-known-issuesIncomplete → Current
  4. 7 Nov 2026 · 12:08:21 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  5. 7 Nov 2026 · 12:08:21 UTC Known issues affecting this updateNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  6. 7 Nov 2026 · 12:08:21 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  7. 6 Nov 2026 · 17:32:22 UTC Missing security releaseUnknown: security evidence is incomplete or retained → None identified in collected security coverage
  8. 6 Nov 2026 · 17:32:22 UTC Known issues resolvedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  9. 6 Nov 2026 · 17:32:22 UTC Known issues affecting this updateUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  10. 6 Nov 2026 · 17:32:22 UTC Source coverage: windows-known-issuesIncomplete → Current
  11. 6 Nov 2026 · 17:32:22 UTC Source coverage: msrc-cvrfIncomplete → Current
  12. 6 Nov 2026 · 16:31:02 UTC Missing security releaseNone identified in collected security coverage → Unknown: security evidence is incomplete or retained
  13. 6 Nov 2026 · 16:31:02 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  14. 6 Nov 2026 · 16:31:02 UTC Known issues affecting this updateNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  15. 6 Nov 2026 · 16:31:02 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  16. 6 Nov 2026 · 16:31:02 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  17. 5 Nov 2026 · 23:42:03 UTC Known issues resolvedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  18. 5 Nov 2026 · 23:42:03 UTC Known issues affecting this updateUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  19. 5 Nov 2026 · 23:42:03 UTC Source coverage: windows-known-issuesIncomplete → Current
  20. 5 Nov 2026 · 22:41:52 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  21. 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
  22. 5 Nov 2026 · 22:41:52 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  23. 3 Nov 2026 · 01:53:36 UTC CVEs listed directly for this KBCVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642 → CVE-2026-66302, CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642
  24. 3 Nov 2026 · 01:53:36 UTC CVEs fixedCVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642 → CVE-2026-66302, CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642
  25. 3 Nov 2026 · 01:53:36 UTC Applies toSkype for Business Server Subscription Edition CU1 → Skype for Business Server 2019 CU8, Skype for Business Server Subscription Edition CU1
  26. 3 Nov 2026 · 01:53:36 UTC SummarySecurity update fixing 9 collected CVEs. → Security update fixing 10 collected CVEs.
  27. 2 Nov 2026 · 17:30:39 UTC Missing security releaseUnknown: security evidence is incomplete or retained → None identified in collected security coverage
  28. 2 Nov 2026 · 17:30:39 UTC Source coverage: msrc-cvrfIncomplete → Current
  29. 2 Nov 2026 · 16:27:39 UTC Missing security releaseNone identified in collected security coverage → Unknown: security evidence is incomplete or retained
  30. 2 Nov 2026 · 16:27:39 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  31. 29 Oct 2026 · 20:19:26 UTC Known issues affecting this updateNone in the collected release health data
  32. 28 Oct 2026 · 08:37:56 UTC Link: Support articlehttps://support.microsoft.com/help/5123287 → https://support.microsoft.com/en-us/help/5123287
  33. 27 Oct 2026 · 16:51:02 UTC CVEs listed directly for this KBCVE-2026-66302, CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642 → CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642
  34. 27 Oct 2026 · 16:51:02 UTC CVEs fixedCVE-2026-66302, CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642 → CVE-2026-69646, CVE-2026-66304, CVE-2026-66307, CVE-2026-66305, CVE-2026-63523, CVE-2026-66303, CVE-2026-66306, CVE-2026-66308, CVE-2026-69642
  35. 27 Oct 2026 · 16:51:02 UTC SummarySecurity update fixing 10 collected CVEs. → Security update fixing 9 collected CVEs.
  36. 23 Oct 2026 · 09:33:49 UTC Missing security releaseUnknown: security evidence is incomplete or retained → None identified in collected security coverage
  37. 23 Oct 2026 · 09:33:49 UTC Known issues resolvedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  38. 23 Oct 2026 · 09:33:49 UTC Known issues causedUnknown: known-issue evidence is incomplete or retained → None in the collected release health data
  39. 23 Oct 2026 · 09:33:49 UTC Source coverage: windows-known-issuesIncomplete → Current
  40. 23 Oct 2026 · 09:33:49 UTC Source coverage: msrc-cvrfIncomplete → Current
  41. 23 Oct 2026 · 08:31:50 UTC Missing security releaseNone identified in collected security coverage → Unknown: security evidence is incomplete or retained
  42. 23 Oct 2026 · 08:31:50 UTC Known issues resolvedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  43. 23 Oct 2026 · 08:31:50 UTC Known issues causedNone in the collected release health data → Unknown: known-issue evidence is incomplete or retained
  44. 23 Oct 2026 · 08:31:50 UTC Source coverage: windows-known-issuesCurrent → Incomplete
  45. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  46. 14 Oct 2026 · 11:22:42 UTC Missing security releaseUnknown: security evidence is incomplete or retained → None identified in collected security coverage
  47. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
ChangeIntel

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