Apr 2026: Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVE-2026-33099 Published on April 14, 2026
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Weakness Type
What is a Dangling pointer Vulnerability?
Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code.
CVE-2026-33099 has been classified to as a Dangling pointer vulnerability or weakness.
Products Associated with CVE-2026-33099
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Affected Versions
Microsoft Windows 10 Version 1607:- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.19044.0 and below 10.0.19044.7184 is affected.
- Version 10.0.19045.0 and below 10.0.19045.7184 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6936 is affected.
- Version 10.0.22631.0 and below 10.0.22631.6936 is affected.
- Version 10.0.26100.0 and below 10.0.26100.32690 is affected.
- Version 10.0.26200.0 and below 10.0.26200.8246 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26026 is affected.
- Version 6.2.9200.0 and below 6.2.9200.26026 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23132 is affected.
- Version 6.3.9600.0 and below 6.3.9600.23132 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.14393.0 and below 10.0.14393.9060 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.17763.0 and below 10.0.17763.8644 is affected.
- Version 10.0.20348.0 and below 10.0.20348.5020 is affected.
- Version 10.0.25398.0 and below 10.0.25398.2274 is affected.