Permissions, Privileges, and Access Controls in Windows Server and Windows - CVE-2023-21768
Published: January 10, 2023 / Updated: June 13, 2025
Vulnerability identifier: #VU71002
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2023-21768
CWE-ID: CWE-264
Exploitation vector: Local access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Microsoft
Affected software:
Windows Server
Windows
Windows Server
Windows
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to application does not properly impose security restrictions in Windows Ancillary Function Driver for WinSock, which leads to security restrictions bypass and privilege escalation.
How to mitigate CVE-2023-21768
Install updates from vendor's website.