Unrated severityNVD Advisory· Published Jan 13, 2026· Updated Apr 1, 2026
Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
CVE-2026-20854
Description
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
Affected products
4- Microsoft/Windows 11 Version 24H2v5Range: 10.0.26100.0
- Microsoft/Windows 11 Version 25H2v5Range: 10.0.26200.0
- Microsoft/Windows Server 2025v5Range: 10.0.26100.0
- Microsoft/Windows Server 2025 (Server Core installation)v5Range: 10.0.26100.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20854mitrevendor-advisorypatch
News mentions
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