CVE-2026-45487

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

7.0

Vector

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

Exploitability: 1.0 / Impact: 5.9

Source: NVD

Description

Time-of-check time-of-use (TOCTOU) race condition in Program Compatibility Assistant Service allows an authorized attacker to elevate privileges locally.

Affected (16)

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 2025

8 products

Configuration A

16 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 21h2	version < 10.0.19044.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
Microsoft Windows 10 22h2	version < 10.0.19045.7417
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

CWE-367

Time-of-check Time-of-use (TOCTOU) Race Condition

The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state.

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45487

Source: secure@microsoft.com

Vendor Advisory

Timeline

No history available yet.