CVE-2025-32709
KEVMicrosoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Description
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to escalate privileges to administrator.
Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HPublishedMay 13, 2025
Last modifiedJun 17, 2026
Added to KEVMay 13, 2025
Remediation dueJun 3, 2025
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2025-32709Vendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-32709US Government Resource
0 recent articles mention this CVE
69
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 510 days
- CVSS
- 7.8 HIGH
- EPSS (30-day exploit probability)
- 1.8% · top 21% of all CVEs
- Weakness
- CWE-416
Recommended actions
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.