CVE-2025-21311
Microsoft Windows 11 24h2 vulnerability
- Published14 Jan 2025
Description
Windows NTLM V1 Elevation of Privilege Vulnerability
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
Frequently asked
Is CVE-2025-21311 being actively exploited?
CVE-2025-21311 is not in the CISA KEV catalog. Its EPSS exploit probability is 2.23%.
How severe is CVE-2025-21311?
CVE-2025-21311 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 2.23% probability of exploitation.
Which products are affected by CVE-2025-21311?
Affected products include Microsoft Windows 11 24h2, Microsoft Windows Server 2022 23h2, Microsoft Windows Server 2025.
How do I fix CVE-2025-21311?
Upgrade affected software to a fixed version, for example Microsoft Windows 11 24h2 10.0.26100.2894, Microsoft Windows Server 2022 23h2 10.0.25398.1369, Microsoft Windows Server 2025 10.0.26100.2894 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2025-21311 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.