CVE-2025-32709

Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability

Microsoft — Windows

Added to KEV catalog: 13 May 2025
Federal remediation due date: 3 June 2025
Weakness classification (CWE): CWE-416

CISA Description

Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to escalate privileges to administrator.

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.

Notes

https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2025-32709 ; https://nvd.nist.gov/vuln/detail/CVE-2025-32709

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