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Recorded 14 Oct 2026 at 11:22 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

KB5099539

Windows 10, version 21H2: KB5099539 · 2026-07 B · OS build 19044.7548

What it said

KB
KB5099539
Windows versions and builds
Windows 10, version 21H2: 19044.7548 (2026-07 B); Windows 10, version 22H2: 19045.7548 (2026-07 B)
Applies to
Windows 10, version 21H2, Windows 10, version 22H2, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems
Restart required
Yes
CVEs fixed
CVE-2026-59116
Known issues caused
None in the collected release health data
Known issues resolved
None in the collected release health data
Included security update
None identified in the collected release tables
CVEs listed directly for this KB
CVE-2026-59116
Missing security release
July 2026
Published
14 Jul 2026 00:00 UTC

Source evidence when recorded

Windows 10 releases
Complete at observationRead 14 Oct 2026 at 11:21 UTC
Microsoft security releases
Complete at observationRead 14 Oct 2026 at 11:21 UTC
Windows known issues
Complete at observationRead 14 Oct 2026 at 11:21 UTC

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

What changed

  1. Restart required: Not stated in collected security fixes → Yes · Applies to: Windows 10, version 21H2, Windows 10, version 22H2 → Windows 10, version 21H2, Windows 10, version 22H2, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems
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 (6)

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  1. 14 Oct 2026 · 11:22:42 UTC CVEs listed directly for this KBUnknown: security evidence or the required release is incomplete → CVE-2026-59116
  2. 14 Oct 2026 · 11:22:42 UTC CVEs fixedUnknown: security evidence or the required release is incomplete → CVE-2026-59116
  3. 14 Oct 2026 · 11:22:42 UTC Restart requiredNot stated in collected security fixes → Yes
  4. 14 Oct 2026 · 11:22:42 UTC Applies toWindows 10, version 21H2, Windows 10, version 22H2 → Windows 10, version 21H2, Windows 10, version 22H2, Windows 10 Version 21H2 for 32-bit Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 21H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 22H2 for x64-based Systems
  5. 14 Oct 2026 · 11:22:42 UTC Source coverage: msrc-cvrfIncomplete → Current
  6. 14 Oct 2026 · 11:22:42 UTC Link: CVE-2026-59116/security/cve/CVE-2026-59116
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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