CVE-2023-21768
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
HIGH
7.8
CVSS Score
Published: January 10, 2023 at 12:00 AM UTC
Updated: June 17, 2026 at 05:33 AM UTC
4 products affected across 1 vendorWindows Server 2022Windows 11Windows 11 22H2
Using Windows Server 2022 by Microsoft?
Get instant alerts when new vulnerabilities affect Windows Server 2022 - before attackers find them.
Real-time alertsTrack your software stackFree plan available
Severity
HIGH7.8
Exploit prediction
EPSS 65%
SSVC
No known exploit
Description
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
10.0.20348.0 ≤ v < 10.0.20348.148710.0.20348.0
Affected range stops below 10.0.20348.1487, so it looks safe — our inference, not a vendor statement
10.0.0 ≤ v < 10.0.22000.145510.0.0
Affected range stops below 10.0.22000.1455, so it looks safe — our inference, not a vendor statement
10.0.22621.0 ≤ v < 10.0.22621.110510.0.22621.0
Affected range stops below 10.0.22621.1105, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (1)
Vendor Advisory
Source: [email protected]
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21768SSVC — Action Prioritization
SSVCNo known exploitNot automatableTotal impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
7.8HIGHmicrosoft
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-822NVD-CWE-noinfo
Get alerted
Stop reading CVE feeds looking for your own stack
Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.
Free plan, no card