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7.0
Windows Ancillary Function Driver for WinSock Privilege Escalation
CVE-2026-33099
Summary
A security issue exists in the Windows Ancillary Function Driver for WinSock. This issue allows an attacker with authorized access to execute malicious code with elevated privileges on a Windows system. To mitigate this issue, apply the latest available security updates for the Windows Ancillary Function Driver for WinSock.
Original title
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Original description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
nvd CVSS3.1
7.0
Vulnerability type
CWE-416
Use After Free
Published: 14 Apr 2026 · Updated: 14 Apr 2026 · First seen: 14 Apr 2026