CVE-2026-56171: Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

Overview

Severity

High (CVSS 7.1)

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

Category

Information Disclosure

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2026-Jul

Released

2026-07-16

Description

Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.

FAQ

Can I install the update via a PowerShell module? Yes, please see instructions here: How to Update the RD Web Client. The link to the PowerShell Gallery is here.

Affected Products (2)

Windows

• Windows Admin Center
• Remote Desktop Web Client

Security Updates (2)

• Release Notes
• Release Notes

Acknowledgments

Anonymous

Revision History

• 2026-07-16: Information published.