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5.5 Medium

CVE-2026-96858 Missing authentication for critical function in Windows Security Account Manager allows an authorized attacker to…

Description

Missing authentication for critical function in Windows Security Account Manager allows an authorized attacker to perform tampering locally.

Affected products and versions

Product	Affected versions	Fixed in
Windows 10 Version 21H2 10.0	10.0.19044.0 → < 10.0.19044.7807	10.0.19044.7807
Windows 10 Version 22H2 10.0	10.0.19045.0 → < 10.0.19045.7807	10.0.19045.7807
Windows 11 Version 23H2 10.0	10.0.22631.0 → < 10.0.22631.7652	10.0.22631.7652
Windows 11 Version 24H2 10.0	10.0.26100.0 → < 10.0.26100.9711	10.0.26100.9711
Windows 11 Version 25H2 10.0	10.0.26200.0 → < 10.0.26200.9711	10.0.26200.9711
Windows 11 version 26H1 10.0	10.0.28000.0 → < 10.0.28000.3231	10.0.28000.3231
Windows 11 Version 26H2 10.0	10.0.26300.0 → < 10.0.26300.9711	10.0.26300.9711
Windows Server 2022 10.0	10.0.20348.0 → < 10.0.20348.5761	10.0.20348.5761
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.33650	10.0.26100.33650

Show the other branch

Product	Affected versions	Fixed in
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.33650	10.0.26100.33650

References

Windows Security Account Manager Tampering Vulnerability msrc.microsoft.com

Timeline

Published October 13, 2026
Last modified October 31, 2026

The 4539 CVEs of Windows 10 Version 21H2 →

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