CRITICAL 9.8 Microsoft
CVE-2025-21311
Windows NTLM V1 Elevation of Privilege Vulnerability
Microsoft Security Update 2025-Jan: Windows NTLM V1 Elevation of Privilege Vulnerability
Affected Products
- Windows Server 2025 (Server Core installation)
- Windows Server 2022, 23H2 Edition (Server Core installation)
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows Server 2025
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21311
- https://nvd.nist.gov/vuln/detail/CVE-2025-21311
This critical severity vulnerability with a CVSS score of 9.8 was published on 2025-01-14 via Microsoft. Affected: Windows Server 2025 (Server Core installation), Windows Server 2022, 23H2 Edition (Server Core installation), Windows 11 Version 24H2 for ARM64-based Systems and 2 more.
Risk Timeline
CVE Disclosed2025-01-14 · 619 days ago
Remediation Resources
Official Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21311NVD / MITRE
nvd.nist.gov/vuln/detail/CVE-2025-21311Related Vulnerabilities
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|---|---|---|---|
| CVE-2026-33824 | Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vul | CRITICAL | 9.8 |
| CVE-2025-47981 PoC | SPNEGO Extended Negotiation (NEGOEX) Security Mechanism Remote Code Execution Vu | CRITICAL | 9.8 |
| CVE-2026-41089 | Windows Netlogon Remote Code Execution Vulnerability | CRITICAL | 9.8 |
| CVE-2026-41096 | Windows DNS Client Remote Code Execution Vulnerability | CRITICAL | 9.8 |
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| CVE-2026-69276 | Microsoft UxTheme Library (uxtheme.dll) Remote Code Execution Vulnerability | CRITICAL | 9.8 |
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