Actively exploited · Published May 13, 2025 · Assigned by microsoft
CVE-2025-32709Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
High 7.8 Exploited
In plain English
A high-severity use-after-free in Windows 10 Version 1507 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on May 13, 2025). The chance it is exploited in the next 30 days is estimated at 1.8% (higher than 79% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. 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 guidance
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Federal agencies must remediate by Jun 3, 2025.
Official description
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
References
- Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability vendor-advisory, patch
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32709 government-resource