All CVE records
CVE-2025-21418 — Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability
CISA KEV listed
Added February 11, 2025 Remediate by March 4, 2025
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.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21418
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