Vulnerability · Published Jan 14, 2025 · Assigned by microsoft
CVE-2025-21311Windows NTLM V1 Elevation of Privilege Vulnerability
Critical 9.8
In plain English
A critical-severity security flaw in Windows 11 Version 24H2 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 83% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)2.3%top 16.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Windows NTLM V1 Elevation of Privilege Vulnerability
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | squid | no fix listed | DEBIAN-CVE-2025-21311 |
| Debian:13 | squid | no fix listed | DEBIAN-CVE-2025-21311 |
| Debian:14 | squid | 7.1-1 | DEBIAN-CVE-2025-21311 |
| Ubuntu:22.04:LTS | squid | no fix listed | UBUNTU-CVE-2025-21311 |
| Ubuntu:24.04:LTS | squid | no fix listed | UBUNTU-CVE-2025-21311 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – before 10.0.26100.2894 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 – before 10.0.25398.1369 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – before 10.0.26100.2894 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – before 10.0.26100.2894 |
Weakness: CWE-303 · Vector: 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
References
- Windows NTLM V1 Elevation of Privilege Vulnerability vendor-advisory, patch