CVE-2025-21311

Windows NTLM V1 Elevation of Privilege Vulnerability

State: Published
Severity: 9.8 Critical
Published: Jan 14, 2025
Updated: Jun 9, 2026
Reserved: Dec 10, 2024

Description

Windows NTLM V1 Elevation of Privilege Vulnerability

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-303 Incorrect Implementation of Authentication Algorithm

Affected Products

Product	Versions
Windows 11 Version 24H2Microsoft	10.0.26100.0 to before 10.0.26100.2894Affected
Windows Server 2022, 23H2 Edition (Server Core installation)Microsoft	10.0.25398.0 to before 10.0.25398.1369Affected
Windows Server 2025Microsoft	10.0.26100.0 to before 10.0.26100.2894Affected
Windows Server 2025 (Server Core installation)Microsoft	10.0.26100.0 to before 10.0.26100.2894Affected

References

Windows NTLM V1 Elevation of Privilege Vulnerabilityvendor-advisorypatch

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.