---
id: CVE-2026-50480
title: >-
  Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege
  Vulnerability
summary: >-
  Heap-based buffer overflow in Windows Web Proxy Auto-Discovery Protocol (WPAD)
  allows an authorized attacker to elevate privileges locally.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-122
vendor: Microsoft
product: Windows 10 Version 1607
affected:
  - windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9339
  - windows_server_2012 >= 6.2.9200.0 < 6.2.9200.26226
  - windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26226
  - windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23291
  - >-
    windows_server_2012_r2_server_core_installation >= 6.3.9600.0 <
    6.3.9600.23291
  - windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9339
  - >-
    windows_server_2016_server_core_installation >= 10.0.14393.0 <
    10.0.14393.9339
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-16T00:00:00+00:00'
published: '2026-07-14'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T22:31:44.382Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-50480'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50480'
    label: >-
      Windows Web Proxy Auto-Discovery Protocol (WPAD) Elevation of Privilege
      Vulnerability
tags:
  - cve.org
epss: 0.00333
epssPercentile: 0.23892
ingestedAt: '2026-09-08T17:06:31.916Z'
---

## Overview

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

## Affected

- `windows_10_version_1607 >= 10.0.14393.0 < 10.0.14393.9339`
- `windows_server_2012 >= 6.2.9200.0 < 6.2.9200.26226`
- `windows_server_2012_server_core_installation >= 6.2.9200.0 < 6.2.9200.26226`
- `windows_server_2012_r2 >= 6.3.9600.0 < 6.3.9600.23291`
- `windows_server_2012_r2_server_core_installation >= 6.3.9600.0 < 6.3.9600.23291`
- `windows_server_2016 >= 10.0.14393.0 < 10.0.14393.9339`
- `windows_server_2016_server_core_installation >= 10.0.14393.0 < 10.0.14393.9339`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.