CVE-2026-55626: CWE-306: Missing Authentication for Critical Function in neutrinolabs xrdp
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.
AI Analysis
Technical Summary
CVE-2026-55626 describes a missing authentication vulnerability (CWE-306) in neutrinolabs xrdp versions 0.10.6 and prior. When using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched without adequate authentication, allowing a local authenticated attacker to bypass session isolation and access other users' active desktop sessions. This vulnerability does not affect other backends such as xorgxrdp or Xvnc over TCP sockets. The vulnerability has been addressed in version 0.10.6.1.
Potential Impact
A local authenticated attacker can bypass intended session isolation to view or control active desktop sessions of other users on the same system, potentially leading to unauthorized access to sensitive information or control over user sessions. The CVSS score of 8.0 (high) reflects the significant confidentiality and integrity impact, with limited availability impact.
Mitigation Recommendations
Upgrade xrdp to version 0.10.6.1 or later, where this vulnerability is fixed. Until then, avoid using the Xvnc backend over UNIX domain sockets or restrict local authenticated user access to trusted individuals only. Patch status is confirmed fixed in 0.10.6.1.
CVE-2026-55626: CWE-306: Missing Authentication for Critical Function in neutrinolabs xrdp
Description
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.
CVSS v3.1
Score 8.0high
Affected software
pkg:github/neutrinolabs/xrdpRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55626 describes a missing authentication vulnerability (CWE-306) in neutrinolabs xrdp versions 0.10.6 and prior. When using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched without adequate authentication, allowing a local authenticated attacker to bypass session isolation and access other users' active desktop sessions. This vulnerability does not affect other backends such as xorgxrdp or Xvnc over TCP sockets. The vulnerability has been addressed in version 0.10.6.1.
Potential Impact
A local authenticated attacker can bypass intended session isolation to view or control active desktop sessions of other users on the same system, potentially leading to unauthorized access to sensitive information or control over user sessions. The CVSS score of 8.0 (high) reflects the significant confidentiality and integrity impact, with limited availability impact.
Mitigation Recommendations
Upgrade xrdp to version 0.10.6.1 or later, where this vulnerability is fixed. Until then, avoid using the Xvnc backend over UNIX domain sockets or restrict local authenticated user access to trusted individuals only. Patch status is confirmed fixed in 0.10.6.1.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T23:31:22.446Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5e61922a4a8d59897a506a
Added to database: 07/20/2026, 17:57:38 UTC
Last enriched: 07/30/2026, 02:12:05 UTC
Last updated: 09/03/2026, 22:52:12 UTC
Views: 85
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