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Recorded 23 Oct 2026 at 08:31 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.

CVEMicrosoft Security Response Center

Microsoft Account Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Account allows an authorized attacker to elevate privileges locally.

Cite this recorded revision

What it said

CVE
CVE-2026-85329
Severity
Important
CVSS base score
7.0
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Impact
Elevation of Privilege
Exploitation detected
Not reported by MSRC
Publicly disclosed
No
Exploitability
Exploitation Less Likely
Component
Microsoft Account
Weakness
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Issued by
Microsoft
Customer action
Required: apply the update
Affected products
Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, 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, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems, Windows Server 2012, Windows Server 2012 (Server Core installation), Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation), Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022 (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)
Updates that fix it
KB5126646: Windows Server 2025, Windows Server 2025 (Server Core installation) (restart required); KB5126651: Windows 10 Version 1809 for 32-bit Systems, Windows 10 Version 1809 for x64-based Systems, Windows Server 2019, Windows Server 2019 (Server Core installation) (restart required); KB5126653: Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems (restart required); KB5126655: Windows Server 2022, Windows Server 2022 (Server Core installation) (restart required); KB5126657: 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); KB5126835: Windows Server 2012, Windows Server 2012 (Server Core installation) (restart required); KB5126836: Windows Server 2012 R2, Windows Server 2012 R2 (Server Core installation) (restart required); KB5126868: Windows 10 Version 1607 for 32-bit Systems, Windows 10 Version 1607 for x64-based Systems, Windows Server 2016, Windows Server 2016 (Server Core installation) (restart required); KB5127646: Windows 11 Version 26H1 for ARM64-based Systems, Windows 11 version 26H1 for x64-based Systems (restart required); KB5127648: Windows 11 Version 24H2 for ARM64-based Systems, Windows 11 Version 24H2 for x64-based Systems, Windows 11 Version 25H2 for ARM64-based Systems, Windows 11 Version 25H2 for x64-based Systems, Windows 11 Version 26H2 for ARM64-based Systems, Windows 11 Version 26H2 for x64-based Systems (restart required)
CISA KEV
Unknown: catalog evidence is incomplete or retained
EPSS
0.2%; scored 22 Oct 2026
Public exploit code
Unknown: exploit-code evidence is incomplete or retained
Published
13 Oct 2026 07:00 UTC
Last revised
13 Oct 2026 07:00 UTC
Revision note
Information published.

Source evidence when recorded

Microsoft security releases
IncompleteRead 23 Oct 2026 at 08:14 UTC
CISA KEV
IncompleteRead 23 Oct 2026 at 08:14 UTC
FIRST EPSS
IncompleteRead 23 Oct 2026 at 08:14 UTC
Public exploit code
IncompleteRead 23 Oct 2026 at 08:14 UTC

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

What changed

First observed 14 Oct 2026
  1. 23 Oct 2026 · 08:31:50 UTC Public exploit codeNo Nuclei template listed → Unknown: exploit-code evidence is incomplete or retained
  2. 23 Oct 2026 · 08:31:50 UTC CISA KEVNot listed in the collected catalog → Unknown: catalog evidence is incomplete or retained
  3. 23 Oct 2026 · 08:31:50 UTC Source coverage: public-exploit-codeCurrent → Incomplete
  4. 23 Oct 2026 · 08:31:50 UTC Source coverage: first-epssCurrent → Incomplete
  5. 23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete
  6. 23 Oct 2026 · 08:31:50 UTC Source coverage: msrc-cvrfCurrent → Incomplete
  7. 22 Oct 2026 · 17:33:15 UTC EPSS0.2%; scored 21 Oct 2026 → 0.2%; scored 22 Oct 2026
  8. 21 Oct 2026 · 21:47:24 UTC EPSS0.2%; scored 20 Oct 2026 → 0.2%; scored 21 Oct 2026
  9. 20 Oct 2026 · 20:53:31 UTC EPSS0.2%; scored 19 Oct 2026 → 0.2%; scored 20 Oct 2026
  10. 19 Oct 2026 · 15:12:40 UTC EPSS0.2%; scored 18 Oct 2026 → 0.2%; scored 19 Oct 2026
  11. 18 Oct 2026 · 14:54:30 UTC EPSS0.2%; scored 16 Oct 2026 → 0.2%; scored 18 Oct 2026
  12. 18 Oct 2026 · 14:54:30 UTC Link: October 2026/security?release=2026-Oct#cves
Show 3 more recent changes
  1. 16 Oct 2026 · 16:13:25 UTCEPSS 0.2%; scored 15 Oct 2026 → 0.2%; scored 16 Oct 2026
  2. 15 Oct 2026 · 21:30:54 UTCEPSS 0.2%; scored 14 Oct 2026 → 0.2%; scored 15 Oct 2026
  3. 15 Oct 2026 · 01:07:54 UTCEPSS Not scored → 0.2%; scored 14 Oct 2026

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ChangeIntel

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Sources read 25 Oct 21:06 UTC · 271 of 271 readable · 269 fully read · documentation 464/464 current

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