Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability
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. CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Structured advisory · Revision 1Original source
Evidence and details
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: kev:CVE-2025-21418
Windows
Source reference: /product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
- Related CVEs
- CVE-2025-21418
Source reference:
/cveID
Publisher severity
No explicit severity was provided.