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7.0

Windows Ancillary Function Driver for WinSock Privilege Escalation

CVE-2026-26177
Summary

The Windows Ancillary Function Driver for WinSock has a bug that allows a malicious user with administrative rights to potentially gain even higher-level access to the system. This means an attacker could potentially gain control over the entire system, allowing them to make changes or steal sensitive information. To protect your system, ensure you have the latest updates installed, and consider implementing additional security measures to limit user privileges.

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: 15 Apr 2026 · First seen: 14 Apr 2026