CVE-2021-38629
MediumCVSS 6.5Exploitation Probability (EPSS)
High risk83th percentile - higher than 83% of all known CVEs
Summary
Information disclosure vulnerability in Windows Ancillary Function Driver for WinSock. Could allow access to sensitive data.
Risk Assessment
Risk of sensitive data leakage from the system through the vulnerable driver.
Recommendation
Install security updates for Windows.
Other vulnerabilities in Windows Ancillary Function Driver for WinSock
See all- 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.
- CVE-2026-68820HighActively exploited
Use-after-free in Windows Ancillary Function Driver for WinSock. An authorized attacker can elevate privileges locally.
- CVE-2026-20860High
A type confusion vulnerability in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2025-21418HighActively exploited
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability.
- CVE-2024-38193HighActively exploited
A vulnerability in the Windows Ancillary Function Driver for WinSock allows for elevation of privilege on Windows systems. The NVD description does not provide technical details or required user interaction.
- CVE-2026-70342High
Use after free in Windows Ancillary Function Driver for WinSock allows an unauthorized attacker to elevate privileges over a network.
- CVE-2026-50349High
A race condition in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-70307High
A use-after-free vulnerability in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
- CVE-2026-61348High
A use-after-free vulnerability in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Original NVD description (English source)
Windows Ancillary Function Driver for WinSock Information Disclosure Vulnerability
Vulnerability data from NVD (NIST) · CISA KEV · EPSS