CVE-2026-24293

Published: Mar 10, 2026Modified: Mar 13, 2026

7.8

Vector

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

Exploitability: 1.8 / Impact: 5.9

Source: secure@microsoft.com

Description

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

Affected (17)

Products: Microsoft: Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2022, Windows Server 2022 23h2, Windows Server 2025

9 products

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022

Windows Server 2022 23h2

Windows Server 2025

Configuration A

17 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 21h2	Before 10.0.19044.7058
Microsoft Windows 10 21h2	Before 10.0.19044.7058
Microsoft Windows 10 21h2	Before 10.0.19044.7058
Microsoft Windows 10 22h2	Before 10.0.19045.7058
Microsoft Windows 10 22h2	Before 10.0.19045.7058
Microsoft Windows 10 22h2	Before 10.0.19045.7058
Microsoft Windows 11 23h2	Before 10.0.22631.6783
Microsoft Windows 11 23h2	Before 10.0.22631.6783
Microsoft Windows 11 24h2	Before 10.0.26100.7979
Microsoft Windows 11 24h2	Before 10.0.26100.7979
Microsoft Windows 11 25h2	Before 10.0.26200.7979
Microsoft Windows 11 25h2	Before 10.0.26200.7979
Microsoft Windows 11 26h1	Before 10.0.28000.1719
Microsoft Windows 11 26h1	Before 10.0.28000.1719
Microsoft Windows Server 2022	Before 10.0.20348.4830
Microsoft Windows Server 2022 23h2	Before 10.0.25398.2207
Microsoft Windows Server 2025	Before 10.0.26100.32463

Related CWEs

NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24293

Source: secure@microsoft.com

Vendor Advisory

Timeline

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