CVE-2023-21768
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
- Published
- Jan 10, 2023
- Updated
- Jan 1, 2025
- Assigning CNA
- microsoft
- Evidence observed
- Aug 8, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Sources
15- cve-2023-21768-compiledExploit
Compiled exploit for CVE-2023-21768, a Windows Local Privilege Escalation vulnerability targeting AFD.sys driver. Tested on Windows 22H2 build 22621.963.
- CVE-2023-21768Exploit
Proof-of-concept exploit for CVE-2023-21768, a Windows Ancillary Function Driver (AFD.sys) arbitrary kernel write vulnerability enabling local privilege escalation via I/O ring.
Windows 11 System Permission Elevation
Responsible use
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