Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-21418US | —OT critical | KEV | ||
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability | ||||
references
External citations — patches, advisories, analysis.
- CVE-2025-21418 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability - CSAFself
- CVE-2025-21418 Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability - HTMLself
- Microsoft Support Lifecycleexternal
- Common Vulnerability Scoring Systemexternal
- Microsoft Exploitability Indexexternal
remediations (37)
- FixedWindows 10 Version 1607 for 32-bit Systems
10.0.14393.7785:Security Update:https://support.microsoft.com/help/5052006
https://support.microsoft.com/help/5052006 - FixedWindows 10 Version 1607 for x64-based Systems
10.0.14393.7785:Security Update:https://support.microsoft.com/help/5052006
https://support.microsoft.com/help/5052006 - FixedWindows 10 Version 1809 for 32-bit Systems
10.0.17763.6893:Security Update:https://support.microsoft.com/help/5052000
https://support.microsoft.com/help/5052000 - FixedWindows 10 Version 1809 for x64-based Systems
10.0.17763.6893:Security Update:https://support.microsoft.com/help/5052000
https://support.microsoft.com/help/5052000 - FixedWindows 10 Version 21H2 for 32-bit Systems
10.0.19044.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 Version 21H2 for ARM64-based Systems
10.0.19044.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 Version 21H2 for x64-based Systems
10.0.19044.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 Version 22H2 for 32-bit Systems
10.0.19045.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 Version 22H2 for ARM64-based Systems
10.0.19045.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 Version 22H2 for x64-based Systems
10.0.19045.5487:Security Update:https://support.microsoft.com/help/5051974
https://support.microsoft.com/help/5051974 - FixedWindows 10 for 32-bit Systems
10.0.10240.20915:Security Update:https://support.microsoft.com/help/5052040
https://support.microsoft.com/help/5052040 - FixedWindows 10 for x64-based Systems
10.0.10240.20915:Security Update:https://support.microsoft.com/help/5052040
https://support.microsoft.com/help/5052040 - FixedWindows 11 Version 22H2 for ARM64-based Systems
10.0.22621.4890:Security Update:https://support.microsoft.com/help/5051989
https://support.microsoft.com/help/5051989 - FixedWindows 11 Version 22H2 for x64-based Systems
10.0.22621.4890:Security Update:https://support.microsoft.com/help/5051989
https://support.microsoft.com/help/5051989 - FixedWindows 11 Version 23H2 for ARM64-based Systems
10.0.22631.4890:Security Update:https://support.microsoft.com/help/5051989
https://support.microsoft.com/help/5051989 - FixedWindows 11 Version 23H2 for x64-based Systems
10.0.22631.4890:Security Update:https://support.microsoft.com/help/5051989
https://support.microsoft.com/help/5051989 - FixedWindows 11 Version 24H2 for ARM64-based Systems
10.0.26100.3194:Security Update:https://support.microsoft.com/help/5051987
https://support.microsoft.com/help/5051987 - FixedWindows 11 Version 24H2 for x64-based Systems
10.0.26100.3194:Security Update:https://support.microsoft.com/help/5051987
https://support.microsoft.com/help/5051987 - FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1
6.1.7601.27566:Monthly Rollup:https://support.microsoft.com/help/5052016
https://support.microsoft.com/help/5052016 - FixedWindows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
6.1.7601.27566:Monthly Rollup:https://support.microsoft.com/help/5052016
https://support.microsoft.com/help/5052016 - FixedWindows Server 2008 for 32-bit Systems Service Pack 2
6.0.6003.23117:Monthly Rollup:https://support.microsoft.com/help/5052038
https://support.microsoft.com/help/5052038 - FixedWindows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
6.0.6003.23117:Monthly Rollup:https://support.microsoft.com/help/5052038
https://support.microsoft.com/help/5052038 - FixedWindows Server 2008 for x64-based Systems Service Pack 2
6.0.6003.23117:Monthly Rollup:https://support.microsoft.com/help/5052038
https://support.microsoft.com/help/5052038 - FixedWindows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
6.0.6003.23117:Monthly Rollup:https://support.microsoft.com/help/5052038
https://support.microsoft.com/help/5052038 - FixedWindows Server 2012
6.2.9200.25317:Monthly Rollup:https://support.microsoft.com/help/5052020
https://support.microsoft.com/help/5052020 - FixedWindows Server 2012 (Server Core installation)
6.2.9200.25317:Monthly Rollup:https://support.microsoft.com/help/5052020
https://support.microsoft.com/help/5052020 - FixedWindows Server 2012 R2
6.3.9600.22417:Monthly Rollup:https://support.microsoft.com/help/5052042
https://support.microsoft.com/help/5052042 - FixedWindows Server 2012 R2 (Server Core installation)
6.3.9600.22417:Monthly Rollup:https://support.microsoft.com/help/5052042
https://support.microsoft.com/help/5052042 - FixedWindows Server 2016
10.0.14393.7785:Security Update:https://support.microsoft.com/help/5052006
https://support.microsoft.com/help/5052006 - FixedWindows Server 2016 (Server Core installation)
10.0.14393.7785:Security Update:https://support.microsoft.com/help/5052006
https://support.microsoft.com/help/5052006 - FixedWindows Server 2019
10.0.17763.6893:Security Update:https://support.microsoft.com/help/5052000
https://support.microsoft.com/help/5052000 - FixedWindows Server 2019 (Server Core installation)
10.0.17763.6893:Security Update:https://support.microsoft.com/help/5052000
https://support.microsoft.com/help/5052000 - FixedWindows Server 2022
10.0.20348.3207:Security Update:https://support.microsoft.com/help/5051979
https://support.microsoft.com/help/5051979 - FixedWindows Server 2022 (Server Core installation)
10.0.20348.3207:Security Update:https://support.microsoft.com/help/5051979
https://support.microsoft.com/help/5051979 - FixedWindows Server 2022, 23H2 Edition (Server Core installation)
10.0.25398.1425:Security Update:https://support.microsoft.com/help/5051980
https://support.microsoft.com/help/5051980 - FixedWindows Server 2025
10.0.26100.3194:Security Update:https://support.microsoft.com/help/5051987
https://support.microsoft.com/help/5051987 - FixedWindows Server 2025 (Server Core installation)
10.0.26100.3194:Security Update:https://support.microsoft.com/help/5051987
https://support.microsoft.com/help/5051987
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