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Dungnm_With

Researcher fromViettel Cyber Security
#33458of 53,632
7.8Total CVSS
Vulnerabilities · 1
PT-2026-2681
7.8
2026-01-13
Microsoft · Windows Ancillary Function Driver For Winsock · CVE-2026-20831
**Name of the Vulnerable Software and Affected Versions** Windows Ancillary Function Driver for WinSock (affected versions not specified) **Description** A time-of-check time-of-use (TOCTOU) race condition exists in the Windows Ancillary Function Driver for WinSock. This condition allows a locally authorized attacker to elevate privileges. The issue arises from a timing window where a check is performed, and the state changes before the operation is carried out, potentially leading to unintended consequences. **Recommendations** At the moment, there is no information about a newer version that contains a fix for this vulnerability.