CVE-2026-55626: xrdp is an open source RDP server

Routine

HIGH 8.0UPGRADE

CVE-2026-55626 is a high-severity flaw (CVSS 8.0) affecting xrdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.0 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 92%)
CISA exploited list	No
Weakness	CWE-287, CWE-306
Published	2026-07-20
Last modified	2026-10-24

Publisher (CNA): GitHub, Inc. · Vendor: neutrinolabs

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-20 18:16 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

neutrinolabs xrdp UPGRADE

Affected: >= 0.10.3 and < 0.10.6.1

Fixed in: 0.10.6.1

Safe to downgrade to: a release before 0.10.3

1. Check installed version

apt-cache policy xrdp || rpm -q xrdp || xrdp --version

2. UPGRADE to 0.10.6.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade xrdp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xrdp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 0.10.3 (Debian / Ubuntu)

apt-cache madison xrdp sudo apt install xrdp=<VERSION_BEFORE_0.10.3> sudo apt-mark hold xrdp

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xrdp sudo dnf downgrade xrdp-<VERSION_BEFORE_0.10.3> sudo dnf versionlock add xrdp

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-55626?

xrdp: upgrade to 0.10.6.1. Exact commands for each OS are on this page.

Is CVE-2026-55626 being exploited?

CVE-2026-55626 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-55626 affect?

CVE-2026-55626 affects xrdp. Severity is high (CVSS 8.0). 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

How urgent is CVE-2026-55626?

Priority 30/100. High severity

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-41252 CRITICAL 9.8 UPGRADE xrdp is an open source RDP server
CVE-2026-41521 HIGH 8.2 UPGRADE xrdp is an open source RDP server
CVE-2026-44178 HIGH 8.8 UPGRADE xrdp is an open source RDP server
CVE-2026-54538 HIGH 7.5 UPGRADE xrdp is an open source RDP server
CVE-2026-55645 MEDIUM 6.5 UPGRADE xrdp is an open source RDP server

References

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