CVE-2025-21418
Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability
⚠ KEVEPSS 13.3%
Description
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.
How to fix CVE-2025-21418
No package mapping is available — consult the references below for vendor-specific guidance.
Is CVE-2025-21418 being exploited?
Yes — CVE-2025-21418 is on the CISA Known Exploited Vulnerabilities (KEV) catalog. Patch immediately.
Affected packages (0)
No package mapping in OSV.