CVE-2025-59257

MediumCVSS 6.5/10Last modified Oct 18, 2026

Description

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

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-1287

Affected software

Vendor	Product	Versions
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.6899
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.6899
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	>= 10.0.25398.0, < 10.0.25398.1913
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.6899
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.6899

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59257Vendor Advisory

Timeline

Published: Oct 14, 2025
Last modified: Oct 18, 2026
NVD status: Analyzed

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