CVE-2025-21418

Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability

Details

CISA date: 2025-02-11
Affected versions: Windows
Summary: Microsoft Windows Ancillary Function Driver for WinSock contains a heap-based buffer overflow vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges.
Remediation: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Exploit info: No exploit-tagged NVD references in our cache; see the CISA KEV link below.

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Information is aggregated from multiple authoritative sources for convenience; verify with NVD and vendors before operational decisions.