CVE-2026-50480

Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege Vulnerability

CVE-2026-50480 is fixed in 8 products on 1 platform, first by KB5099535, released July 14, 2026. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0033

26th percentile

<p>Heap-based buffer overflow in Windows Web Proxy Auto-Discovery Protocol (WPAD) allows an authorized attacker to elevate privileges locally.</p>

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1607 for 32-bit Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1607 for x64-based Systems	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2012		KB5099445	Jul 14, 2026
Windows Server 2012		KB5099415	Jul 14, 2026
Windows Server 2012 (Server Core installation)		KB5099445	Jul 14, 2026
Windows Server 2012 (Server Core installation)		KB5099415	Jul 14, 2026
Windows Server 2012 R2		KB5099444	Jul 14, 2026
Windows Server 2012 R2		KB5099415	Jul 14, 2026
Windows Server 2012 R2 (Server Core installation)		KB5099444	Jul 14, 2026
Windows Server 2012 R2 (Server Core installation)		KB5099415	Jul 14, 2026
Windows Server 2016	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2016 (Server Core installation)	14393.9339	KB5099535	Jul 14, 2026

Details

Published
July 14, 2026
Weakness
Heap-based Buffer Overflow
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50480

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