CVE-2026-50398

Windows Media Elevation of Privilege Vulnerability

CVE-2026-50398 is fixed in 8 products on 1 platform, first by KB5101650, released July 14, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

8.8

Important

Exploitation

None reported

Exploitation Unlikely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0057

47th percentile

<p>Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Media allows an authorized attacker to elevate privileges over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 24H2 for x64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 25H2 for ARM64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 25H2 for x64-based Systems		KB5101650	Jul 14, 2026
Windows 11 Version 26H1 for ARM64-based Systems	28000.2525	KB5101649	Jul 14, 2026
Windows 11 version 26H1 for x64-based Systems	28000.2525	KB5101649	Jul 14, 2026
Windows Server 2025	26100.33158	KB5099536	Jul 14, 2026
Windows Server 2025 (Server Core installation)	26100.33158	KB5099536	Jul 14, 2026

Details

Published
July 14, 2026
Weakness
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50398

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