CVE-2026-24293

Published: Mar 10, 2026Modified: Jun 19, 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 (Secondary)

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	version < 10.0.19044.7058
Microsoft Windows 10 21h2	version < 10.0.19044.7058
Microsoft Windows 10 21h2	version < 10.0.19044.7058
Microsoft Windows 10 22h2	version < 10.0.19045.7058
Microsoft Windows 10 22h2	version < 10.0.19045.7058
Microsoft Windows 10 22h2	version < 10.0.19045.7058
Microsoft Windows 11 23h2	version < 10.0.22631.6783
Microsoft Windows 11 23h2	version < 10.0.22631.6783
Microsoft Windows 11 24h2	version < 10.0.26100.7979
Microsoft Windows 11 24h2	version < 10.0.26100.7979
Microsoft Windows 11 25h2	version < 10.0.26200.7979
Microsoft Windows 11 25h2	version < 10.0.26200.7979
Microsoft Windows 11 26h1	version < 10.0.28000.1719
Microsoft Windows 11 26h1	version < 10.0.28000.1719
Microsoft Windows Server 2022	version < 10.0.20348.4830
Microsoft Windows Server 2022 23h2	version < 10.0.25398.2207
Microsoft Windows Server 2025	version < 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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