CVE-2026-50684

Active Directory Federation Server Spoofing Vulnerability

CVE-2026-50684 is fixed in 15 products on 1 platform, first by KB5099535, released July 14, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

4.8

Important

Exploitation

None reported

N/A

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0040

33rd percentile

<p>Improper neutralization of input during web page generation ('cross-site scripting') in Active Directory Federation Services (AD FS) allows an authorized 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	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1607 for x64-based Systems	14393.9339	KB5099535	Jul 14, 2026
Windows 10 Version 1809 for 32-bit Systems	17763.9020	KB5099538	Jul 14, 2026
Windows 10 Version 1809 for x64-based Systems	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2012		KB5099445	Jul 14, 2026
Windows Server 2012 (Server Core installation)		KB5099445	Jul 14, 2026
Windows Server 2012 R2		KB5099444	Jul 14, 2026
Windows Server 2012 R2 (Server Core installation)		KB5099444	Jul 14, 2026
Windows Server 2016	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2016 (Server Core installation)	14393.9339	KB5099535	Jul 14, 2026
Windows Server 2019	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2019 (Server Core installation)	17763.9020	KB5099538	Jul 14, 2026
Windows Server 2022	20348.5386	KB5099540	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
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50684

For tools and AI agents

This page as data: JSON · Markdown

Link to this page

If this page saved you time, a link to it in your ticket, advisory or write-up helps others find it.

HTML

<a href="https://patchblox.com/security/cve/CVE-2026-50684">CVE-2026-50684 on Patchblox Patch Radar</a>

Reusing the data? How to credit Patch Radar.

Is this on your machines?

Patchblox finds every install below the fixed version on Windows, macOS and Linux, and updates them through your release rings.

Get a demo

Patch Radar data is free to use with attribution. Terms and how to credit it.

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.