CVE-2026-33689: xrdp is an open source RDP server

Q: How do I fix CVE-2026-33689?

xrdp: upgrade to 0.10.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-33689 being exploited?

CVE-2026-33689 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-2026-33689 affect?

CVE-2026-33689 affects xrdp. Severity is critical (CVSS 9.1). xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted

Q: How urgent is CVE-2026-33689?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.1REMOTEUPGRADE

CVE-2026-33689 is a critical-severity flaw (CVSS 9.1) 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 through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted sequence of packets during the initial connection phase. This vulnerability results from insufficient validation of input buffer lengths before processing dynamic channel communication. Successful exploitation

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.1 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-125
Published	2026-04-17
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-17 21:16 UTCPublished CVE record published
2026-10-26 21:10 UTCUpdated Record last modified

neutrinolabs xrdp UPGRADE

Affected: < 0.10.6

Fixed in: 0.10.6

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 (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-2026-33689?

xrdp: upgrade to 0.10.6. Exact commands for each OS are on this page.

Is CVE-2026-33689 being exploited?

CVE-2026-33689 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-2026-33689 affect?

CVE-2026-33689 affects xrdp. Severity is critical (CVSS 9.1). xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafted

How urgent is CVE-2026-33689?

Priority 47/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

WinRM and RDP vulnerabilities

Related CVEs

CVE-2026-32623 HIGH 8.1 UPGRADE xrdp is an open source RDP server
CVE-2026-32624 MEDIUM 6.5 UPGRADE xrdp is an open source RDP server
CVE-2026-32105 HIGH 7.7 UPGRADE xrdp is an open source RDP server
CVE-2026-33145 MEDIUM 6.3 UPGRADE xrdp is an open source RDP server
CVE-2026-33516 CRITICAL 9.1 UPGRADE xrdp is an open source RDP server

References

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