CVE-2026-24293

Published: Mar 10, 2026

Modified: Apr 14, 2026

PUBLISHED

CVSS v3.1

7.8

HIGH

Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Vendor	Product	Versions
Microsoft	Windows 10 Version 21H2	affected `10.0.19044.0 - < 10.0.19044.7058`
Microsoft	Windows 10 Version 22H2	affected `10.0.19045.0 - < 10.0.19045.7058`
Microsoft	Windows 11 version 22H3	affected `10.0.22631.0 - < 10.0.22631.6783`
Microsoft	Windows 11 Version 23H2	affected `10.0.22631.0 - < 10.0.22631.6783`
Microsoft	Windows 11 Version 24H2	affected `10.0.26100.0 - < 10.0.26100.8037`
Microsoft	Windows 11 Version 25H2	affected `10.0.26200.0 - < 10.0.26200.8037`
Microsoft	Windows 11 version 26H1	affected `10.0.28000.0 - < 10.0.28000.1719`
Microsoft	Windows Server 2022	affected `10.0.20348.0 - < 10.0.20348.4893`
Microsoft	Windows Server 2022, 23H2 Edition (Server Core installation)	affected `10.0.25398.0 - < 10.0.25398.2207`
Microsoft	Windows Server 2025	affected `10.0.26100.0 - < 10.0.26100.32522`
Microsoft	Windows Server 2025 (Server Core installation)	affected `10.0.26100.0 - < 10.0.26100.32522`

CVSS v3.1 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

vendor-advisory

patch

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