CVE-2026-50480

Published: Jul 14, 2026Modified: Jul 21, 2026

7.8

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 1.8 / Impact: 5.9

Source: secure@microsoft.com (Secondary)

Description

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

Affected (5)

Products: Microsoft: Windows 10 1607, Windows Server 2012, Windows Server 2016

3 products

Windows 10 1607

Windows Server 2012

Windows Server 2016

Configuration A

5 vulnerable

Vulnerable Software	Affected Versions
Microsoft Windows 10 1607	Before 10.0.14393.9339
Microsoft Windows 10 1607	Before 10.0.14393.9339
Microsoft Windows Server 2012	All versions
Microsoft Windows Server 2012	Version r2
Microsoft Windows Server 2016	Before 10.0.14393.9339

Related CWEs

Heap-based Buffer Overflow

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

References (1)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50480

Source: secure@microsoft.com

PatchVendor Advisory

Timeline

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