high7.8Known exploited
CVE-2025-32709
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Exploited in the wild
This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2025-05-13. Federal due date: 2025-06-03.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Impact
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows 10 1507 | before 10.0.10240.21014 |
| Microsoft | Windows 10 1607 | before 10.0.14393.8066 |
| Microsoft | Windows 10 1809 | before 10.0.17763.7314 |
| Microsoft | Windows 10 21h2 | before 10.0.19044.5854 |
| Microsoft | Windows 10 22h2 | before 10.0.19045.5854 |
| Microsoft | Windows 11 22h2 | before 10.0.22621.5335 |
| Microsoft | Windows 11 23h2 | before 10.0.22631.5335 |
| Microsoft | Windows 11 24h2 | before 10.0.26100.3981 |
| Microsoft | Windows Server 2008 | All versions Version r2 |
| Microsoft | Windows Server 2012 | All versions Version r2 |
| Microsoft | Windows Server 2016 | before 10.0.14393.8066 |
| Microsoft | Windows Server 2019 | before 10.0.17763.7314 |