HIGHCVE-2026-20854Published Modified CNA microsoft
CVE-2026-20854: Windows Local Security Authority Subsystem Service (LSASS) Remote Code Execution Vulnerability
Use after free in Windows Local Security Authority Subsystem Service (LSASS) allows an authorized attacker to execute code over a network.
Metrics
- CVSS v3.1
- 7.5
- Severity
- HIGH
- Fixed in
- 10.0.26100.7623
- Affected Products
- 4
Fix available
10.0.26100.762310.0.26100.3223010.0.26200.7623
Affected packages
- Microsoft / Windows 11 Version 24H2< 10.0.26100.7623 (from 10.0.26100.0)
- Microsoft / Windows 11 Version 25H2< 10.0.26200.7623 (from 10.0.26200.0)
- Microsoft / Windows Server 2025< 10.0.26100.32230 (from 10.0.26100.0)
- Microsoft / Windows Server 2025 (Server Core installation)< 10.0.26100.32230 (from 10.0.26100.0)
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C