CVE-2026-42900

Microsoft · Published July 14, 2026

8.1

CVSS v3.1

HIGH

Patch availableGet patch

Description

Microsoft Windows App Store Elevation of Privilege Vulnerability. Concurrent execution using shared resource with improper synchronization ('race condition') in Windows App Store allows an unauthorized attacker to elevate privileges over a network.

Affected Products

Windows 10 Version 1809 for 32-bit Systems
Windows 10 Version 1809 for x64-based Systems
Windows Server 2019
Windows Server 2019 (Server Core installation)

CVSS Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C