Medium severity6.5NVD Advisory· Published Oct 14, 2025· Updated Jun 17, 2026

CVE-2025-59257

Description

Improper validation of specified type of input in Windows Local Session Manager (LSM) allows an authorized attacker to deny service over a network.

Microsoft/Windows 11 24h22 versions
cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:*:*range: <10.0.26100.6899
- (no CPE)range: 10.0.26100.0
Microsoft/Windows 11 25h22 versions
cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:*:*range: <10.0.26200.6899
- (no CPE)range: 10.0.26200.0
Microsoft/Windows Server 2012
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*
Range: <10.0.25398.1913
Microsoft/Windows Server 20252 versions
cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:*:*range: <=10.0.26100.6899
- (no CPE)range: 10.0.26100.0
Microsoft/Windows Local Session Managerllm-fuzzy
Microsoft/Windows Server 2022, 23H2 Edition (Server Core installation)v5
Range: 10.0.25398.0
Microsoft/Windows Server 2025 (Server Core installation)v5
Range: 10.0.26100.0