CVE-2026-121671HighMicrosoft CVSS 7.0CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Microsoft security update for CVE-2026-121671 — Windows

Published
November 10, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2026-121671 →

📋 Microsoft's advisory

EchelonGraph does not copy Microsoft's advisory page: its FAQ and remediation text are not shown here. Read the advisory on https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-121671. This page also shows what EchelonGraph holds for CVE-2026-121671, with the description from its CVE record, which the CVE Numbering Authority that assigned the CVE wrote: for a CVE Microsoft assigned, often in the words of Microsoft's own advisory.

🎯 Affected products20

  • 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 26H2 for ARM64-based Systems
  • Windows 11 Version 26H2 for x64-based Systems
  • Windows 11 version 26H1 for x64-based Systems
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows Server 2025
  • Windows Server 2025 (Server Core installation)

✅ Updates Microsoft lists: 6 KB articles and 4 other updates

13 rows: one per KB article or update, update type and fixed build. Their details are on Microsoft's advisory.

KB articleUpdateFixed build
KB5131096Security Update10.0.19044.7846
KB5131096Security Update10.0.19045.7846
KB5131090Security Update10.0.20348.5870
KB5131087Security Update10.0.22631.7711
KB5132061Security Update10.0.26100.9974
—Security Update10.0.26100.9911
KB5132061Security Update10.0.26200.9974
—Security Update10.0.26200.9911
KB5132061Security Update10.0.26300.9974
—Security Update10.0.26300.9911
KB5131080Security Update10.0.26100.33822
—Security Update10.0.26100.33730
KB5132059Security Update10.0.28000.3501

🧭 EchelonGraph on CVE-2026-121671

EchelonGraph score
7.0 HIGH
CISA KEV
Not listed
Fix status
A fix is available — apply it.

Description from the CVE record (CVE.org), as published by its numbering authority

Use after free in Windows Audio Service allows an authorized attacker to elevate privileges locally.

Published by Microsoft Corporation, the CVE Numbering Authority that assigned CVE-2026-121671, in its CVE record at CVE.org; reused under the CVE Program's Terms of Use (its licence and MITRE's copyright notice are in our Terms of Service).

🔗 References (15)