TI-2026-40154 Aliases CVE-2026-55626

xrdp: No authentication required with Xvnc backend on RHEL 9

LOW 36CWE-287Published 2026-07-20 · Updated 2026-07-24

Key facts

Attack vector: Local
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · Low
Fix status: Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00187 8th percentileScored 2026-11-07

Fix Fixed xrdp (neutrinolabs): 0.10.6.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
neutrinolabs	xrdp	before 0.10.6.1	0.10.6.1	Patch available	CNA

xrdp Vendorneutrinolabs Affected before 0.10.6.1 Fixed in 0.10.6.1 Patch available CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:neutrinolabs:xrdp::::::::	0.10.3 to before 0.10.6.1	Vulnerable	neutrinolabs

cpe:2.3:a:neutrinolabs:xrdp:*:*:*:*:*:*:*:* Versions 0.10.3 to before 0.10.6.1 Vulnerable ·neutrinolabs

Remediation

Fix · CNA xrdp (neutrinolabs) Fixed in 0.10.6.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2026-55626

References

Advisory 1

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-m3xx-cpc4-982r

Other 1

https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1

TI-2025-42163 xrdp improperly checks bounds of domain string length, which leads to Stack-based Buffer Overflow CVSS 3.1CRITICAL 9.8
TI-2026-29860 xrdp: lib_palette_update Heap Buffer Overflow & RCE CVSS 3.1CRITICAL 9.8
TI-2022-07540 Buffer Overflow in xrdp CVSS 3.1CRITICAL 9.8
TI-2022-07539 Buffer Overflow occurs in xrdp CVSS 3.1CRITICAL 9.8
TI-2022-07538 Out of Bound Write in xrdp CVSS 3.1CRITICAL 9.8
TI-2022-07537 Buffer Overflow in xrdp CVSS 3.1CRITICAL 9.8

See all 36 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences