CVE-2021-38638
HighCVSS 7.8Exploitation Probability (EPSS)
Low risk37th percentile - higher than 37% of all known CVEs
Summary
Elevation of privilege vulnerability in Windows Ancillary Function Driver for WinSock. An attacker could exploit it to gain higher privileges on the system.
Risk Assessment
Risk of privilege escalation and system takeover, potentially leading to data security compromise.
Recommendation
Apply Windows security updates provided by Microsoft.
Other vulnerabilities in Windows Ancillary Function Driver for WinSock
See all- CVE-2026-88149High
A double free vulnerability in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-83738High
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-70245High
A type confusion in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-70237High
Use after free vulnerability in the Windows Ancillary Function Driver for WinSock. An authorized attacker can elevate privileges locally.
- CVE-2026-70225High
Type confusion (access of resource using incompatible type) in the Windows Ancillary Function Driver for WinSock. An authorized attacker can elevate privileges locally.
- CVE-2026-70205High
Access of resource using incompatible type ('type confusion') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-70195Medium
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to disclose information locally.
- CVE-2026-70168High
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-34344High
The Windows Ancillary Function Driver for WinSock has a vulnerability related to resource access using an incompatible type ('type confusion'), allowing an authorized attacker to elevate privileges locally.
- CVE-2026-20810High
A vulnerability in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. The issue involves freeing memory not on the heap.
Original NVD description (English source)
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS