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 · 574 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
| CVE | Title | Severity | CVSS |
|---|---|---|---|
| CVE-2026-57092 | Microsoft Windows VMSwitch Elevation of Privilege Vulnerability | CRITICAL | 9.9 |
| CVE-2025-21298 PoC | Windows OLE Remote Code Execution Vulnerability | CRITICAL | 9.8 |
| CVE-2025-21307 | Windows Reliable Multicast Transport Driver (RMCAST) Remote Code Execution Vulne | CRITICAL | 9.8 |
| CVE-2026-33824 PoC | Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vul | CRITICAL | 9.8 |
| CVE-2024-38077 PoC | Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability | CRITICAL | 9.8 |
| CVE-2024-38074 | Windows Remote Desktop Licensing Service Remote Code Execution Vulnerability | CRITICAL | 9.8 |
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