CVE-2026-50508

Windows NTLM Spoofing Vulnerability

CVE-2026-50508 is fixed in 13 products on 1 platform, first by KB5094122, released June 9, 2026. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent

CVSS

6.5

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.1144

96th percentile

<p>Exposure of sensitive information to an unauthorized actor in Windows NTLM allows an unauthorized attacker to perform spoofing over a network.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1607 for 32-bit Systems	14393.9234	KB5094122	Jun 9, 2026
Windows 10 Version 1607 for x64-based Systems	14393.9234	KB5094122	Jun 9, 2026
Windows 11 Version 22H2 for ARM64-based Systems	22631.7219	KB5093998	Jun 9, 2026
Windows 11 Version 22H2 for x64-based Systems	22631.7219	KB5093998	Jun 9, 2026
Windows Server 2012		KB5094042	Jun 9, 2026
Windows Server 2012 (Server Core installation)		KB5094042	Jun 9, 2026
Windows Server 2012 R2		KB5094041	Jun 9, 2026
Windows Server 2012 R2 (Server Core installation)		KB5094041	Jun 9, 2026
Windows Server 2016	14393.9234	KB5094122	Jun 9, 2026
Windows Server 2016 (Server Core installation)	14393.9234	KB5094122	Jun 9, 2026
Windows Server 2022	20348.5256	KB5094128	Jun 9, 2026
Windows Server 2022 (Server Core installation)	20348.5256	KB5094128	Jun 9, 2026
Windows Server, version 2004 (Server Core installation)		KB5094127	Jun 9, 2026

Details

Published
June 9, 2026
Weakness
Exposure of Sensitive Information to an Unauthorized Actor
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50508

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