High · 7.0 CVE-2026-50403 EUVD-2026-43920GHSA-g784-2pg8-v3q9

Windows Runtime Elevation of Privilege Vulnerability

Published Jul 14, 2026 · Updated Nov 10, 2026 · Assigned by microsoft

Vendor: Microsoft Product: Windows 11 Version 24H2 Product: Windows 11 Version 25H2 Product: Windows 11 version 26H1 Product: Windows Server 2025 Product: Windows Server 2025 (Server Core installation) Platform: Windows

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Runtime allows an authorized attacker to elevate privileges locally.

Affected products

Vendor	Product	Affected	Fixed
Microsoft	Windows 11 Version 24H2	10.0.26100.0 – < 10.0.26100.8875	10.0.26100.8875
Microsoft	Windows 11 Version 25H2	10.0.26200.0 – < 10.0.26200.8875	10.0.26200.8875
Microsoft	Windows 11 version 26H1	10.0.28000.0 – < 10.0.28000.2525	10.0.28000.2525
Microsoft	Windows Server 2025	10.0.26100.0 – < 10.0.26100.33158	10.0.26100.33158
Microsoft	Windows Server 2025 (Server Core installation)	10.0.26100.0 – < 10.0.26100.33158	10.0.26100.33158

Advisories 3

WID-SEC-2026-2316 Microsoft Windows Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 6, 2026
NCSC-2026-0231 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Jul 14, 2026
MSRC-CVE-2026-50403 Windows Runtime Elevation of Privilege Vulnerability Microsoft Security Response Center · Jul 14, 2026

References

Windows Runtime Elevation of Privilege Vulnerability vendor-advisory patch