CVE-2026-21241
Published: Feb 10, 2026
Modified: May 11, 2026
CVSS v3.1
7.0
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
| Vendor | Product | Versions |
|---|---|---|
Microsoft | Windows 11 version 22H3 | affected 10.0.22631.0 - < 10.0.22631.6649 |
Microsoft | Windows 11 Version 23H2 | affected 10.0.22631.0 - < 10.0.22631.6649 |
Microsoft | Windows 11 Version 24H2 | affected 10.0.26100.0 - < 10.0.26100.7840 |
Microsoft | Windows 11 Version 25H2 | affected 10.0.26200.0 - < 10.0.26200.7840 |
Microsoft | Windows 11 version 26H1 | affected 10.0.28000.0 - < 10.0.28000.1575 |
Microsoft | Windows 11 Version 26H1 | affected 10.0.28000.0 - < 10.0.28000.1575 |
Microsoft | Windows Server 2022 | affected 10.0.20348.0 - < 10.0.20348.4773 |
Microsoft | Windows Server 2022, 23H2 Edition (Server Core installation) | affected 10.0.25398.0 - < 10.0.25398.2149 |
Microsoft | Windows Server 2025 | affected 10.0.26100.0 - < 10.0.26100.32370 |
Microsoft | Windows Server 2025 (Server Core installation) | affected 10.0.26100.0 - < 10.0.26100.32370 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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