Race condition in Windows and Windows Server - CVE-2026-42900
Published: July 15, 2026
Vulnerability identifier: #VU137552
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-42900
CWE-ID: CWE-362
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to a race condition in Microsoft Windows App Store. A remote attacker can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.
How to mitigate CVE-2026-42900
Install updates from vendor's website.