CVE-2026-55238: xrdp is an open source RDP server

Q: How do I fix CVE-2026-55238?

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

Q: Is CVE-2026-55238 being exploited?

CVE-2026-55238 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-55238 affect?

CVE-2026-55238 affects xrdp. Severity is medium (CVSS 5.3). xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation

Q: How urgent is CVE-2026-55238?

Priority 34/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADE

CVE-2026-55238 is a medium-severity flaw (CVSS 5.3) 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. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 57%)
CISA exploited list	No
Weakness	CWE-126
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 17:18 UTCPublished CVE record published
2026-10-24 20:10 UTCUpdated Record last modified

neutrinolabs xrdp UPGRADE

Affected: < 0.10.6.1

Fixed in: 0.10.6.1

Safe to downgrade to: no unaffected older release

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.

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-2026-55238?

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

Is CVE-2026-55238 being exploited?

CVE-2026-55238 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-2026-55238 affect?

CVE-2026-55238 affects xrdp. Severity is medium (CVSS 5.3). xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation

How urgent is CVE-2026-55238?

Priority 34/100. Remotely exploitable, no login, no user action

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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