CVE-2026-42982

Published: Jul 14, 2026Modified: Jul 22, 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

Improper validation of consistency within input in Windows Secure Kernel Mode allows an authorized attacker to elevate privileges locally.

Affected (22)

Products: Microsoft: Windows 10 1607, Windows 10 1809, Windows 10 21h2, Windows 10 22h2, Windows 11 23h2, Windows 11 24h2, Windows 11 25h2, Windows 11 26h1, Windows Server 2016, Windows Server 2019, Windows Server 2022, Windows Server 2025

12 products

Windows 10 1607

Windows 10 1809

Windows 10 21h2

Windows 10 22h2

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2016

Windows Server 2019

Windows Server 2022

Windows Server 2025

Configuration A

22 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	version < 10.0.14393.9339
Microsoft Windows 10 1607	version < 10.0.14393.9339
Microsoft Windows 10 1809	version < 10.0.17763.9020
Microsoft Windows 10 1809	version < 10.0.17763.9020
Microsoft Windows 10 21h2	version < 10.0.19044.7548
Microsoft Windows 10 21h2	version < 10.0.19044.7548
Microsoft Windows 10 21h2	version < 10.0.19044.7548
Microsoft Windows 10 22h2	version < 10.0.19045.7548
Microsoft Windows 10 22h2	version < 10.0.19045.7548
Microsoft Windows 10 22h2	version < 10.0.19045.7548
Microsoft Windows 11 23h2	version < 10.0.22631.7376
Microsoft Windows 11 23h2	version < 10.0.22631.7376
Microsoft Windows 11 24h2	version < 10.0.26100.8875
Microsoft Windows 11 24h2	version < 10.0.26100.8875
Microsoft Windows 11 25h2	version < 10.0.26200.8875
Microsoft Windows 11 25h2	version < 10.0.26200.8875
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows Server 2016	version < 10.0.14393.9339
Microsoft Windows Server 2019	version < 10.0.17763.9020
Microsoft Windows Server 2022	version < 10.0.20348.5386
Microsoft Windows Server 2025	version < 10.0.26100.33158

Related CWEs

Improper Validation of Consistency within Input

The product receives a complex input with multiple elements or fields that must be consistent with each other, but it does not validate or incorrectly validates that the input is actually consistent.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42982

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.