KEV · Actively exploited
CVE-2025-21418
HIGH 7.8
KEV
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
EPSS
13.27%
moderate exploit risk
percentile 94.3%
CISA Known Exploited Vulnerability
- Added to KEV
- 2025-02-11
- Remediation deadline
- 2025-03-04
- Required action
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- Ransomware
- No
OS versions that fix this CVE
This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.
- Windows Fixed in Windows Server 2025 (Server Core installation) 10.0.26100.3194 Windows Server 2025 10.0.26100.3194 Windows Server 2022 (Server Core installation) 10.0.20348.3207 Windows Server 2022 10.0.25398.1425 Windows Server 2019 (Server Core installation) 10.0.17763.6893 Windows Server 2019 10.0.17763.6893 Windows Server 2016 (Server Core installation) 10.0.14393.7785 Windows Server 2016 10.0.14393.7785 Windows 11 24H2 · 2024-H2 10.0.26100.3194 Windows 11 23H2 · 2023-H2 10.0.22631.4890 Windows 11 22H2 · 2022-H2 10.0.22621.4890 Windows 10 22H2 · 2022-H2 10.0.19045.5487 Windows 10 21H2 · 2021-H2 10.0.19044.5487 Windows 10 1809 · 2018-09 10.0.17763.6893 Windows 10 1607 · 2016-07 10.0.14393.7785