CVE-2025-32709
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-32709 ; https://nvd.nist.gov/vuln/detail/CVE-2025-32709
Description
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Severity
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CAffected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 Version 1507 | 10.0.10240.0 to <10.0.10240.21014 |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 to <10.0.14393.8066 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 to <10.0.17763.7314 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 to <10.0.19044.5854 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 to <10.0.19045.5854 |
| Microsoft | Windows 11 version 22H2 | 10.0.22621.0 to <10.0.22621.5335 |
| Microsoft | Windows 11 version 22H3 | 10.0.22631.0 to <10.0.22631.5335 |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 to <10.0.22631.5335 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 to <10.0.26100.4061 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 | 6.1.7601.0 to <6.1.7601.27730 |
| Microsoft | Windows Server 2008 R2 Service Pack 1 (Server Core installation) | 6.1.7601.0 to <6.1.7601.27730 |
| Microsoft | Windows Server 2008 Service Pack 2 | 6.0.6003.0 to <6.0.6003.23317 |
| Microsoft | Windows Server 2008 Service Pack 2 (Server Core installation) | 6.0.6003.0 to <6.0.6003.23317 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 to <6.2.9200.25475 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 to <6.2.9200.25475 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 to <6.3.9600.22577 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 to <6.3.9600.22577 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 to <10.0.14393.8066 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 to <10.0.14393.8066 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 to <10.0.17763.7314 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 to <10.0.17763.7314 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 to <10.0.20348.3692 |
| Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | 10.0.25398.0 to <10.0.25398.1611 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 to <10.0.26100.4061 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 to <10.0.26100.4061 |
References
1 LinksRecord Details
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