CVE-2026-42981

Published: Jun 9, 2026Modified: Jun 17, 2026

8.1

Vector

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

Exploitability: 2.2 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

Integer underflow (wrap or wraparound) in Windows Performance Monitor allows an unauthorized attacker to execute code over a network.

Affected (10)

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

6 products

Windows 11 23h2

Windows 11 24h2

Windows 11 25h2

Windows 11 26h1

Windows Server 2022

Windows Server 2025

Configuration A

10 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 11 23h2	version < 10.0.22631.7219
Microsoft Windows 11 23h2	version < 10.0.22631.7219
Microsoft Windows 11 24h2	version < 10.0.26100.8655
Microsoft Windows 11 24h2	version < 10.0.26100.8655
Microsoft Windows 11 25h2	version < 10.0.26200.8655
Microsoft Windows 11 25h2	version < 10.0.26200.8655
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows 11 26h1	version < 10.0.28000.2269
Microsoft Windows Server 2022	version < 10.0.20348.5256
Microsoft Windows Server 2025	version < 10.0.26100.32995

Related CWEs

Integer Underflow (Wrap or Wraparound)

The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42981

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.