CVE-2026-55626 HIGH

CVE-2026-55626: xrdp: No authentication required with Xvnc backend on RHEL 9

Vendor Neutrinolabs
Product xrdp
Weakness CWE-306 · Missing auth
Published July 20, 2026
Last update July 20, 2026

CVSS base score

8.0/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

xrdp is an open source RDP server. In versions 0.10.6 and prior, when an authenticated user session is initialized using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched with insufficient authentication mechanisms. A local authenticated attacker could exploit this vulnerability to bypass intended session isolation, allowing them to unauthorizedly view or control the active desktop sessions of other users on the same system. Users using other backends, such as xorgxrdp or Xvnc over TCP sockets, are not affected. This issue has been fixed in version 0.10.6.1.

Key dates

02Disclosure timeline

July 20, 2026 CVE published

Related vulnerabilities

04Related CVE