Auth bypass in Neutrinolabs Xrdp
CVE-2026-55626
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.002 (7.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 7.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001
Affected products
- Neutrinolabs Xrdp — versions < 0.10.6.1
Weakness classification (CWE)
References
- github.com/neutrinolabs/xrdp/security/advisories/GHSA-m3xx-cpc4-982r (Vendor Advisory)
- github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 (Product, Release Notes)
Frequently asked questions
- What is CVE-2026-55626?
- CVE-2026-55626 is a high-severity vulnerability in Neutrinolabs Xrdp, classified under Improper Authentication. CVSS score: 8.0/10. Published 2026-07-20.
- How severe is CVE-2026-55626?
- High severity. CVSS v3 base score is 8.0 out of 10.