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CVE-2026-41252: xrdp is an open source RDP server

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CRITICAL 9.8REMOTEUPGRADE

CVE-2026-41252 is a critical-severity flaw (CVSS 9.8) 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 missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map messages from a VNC server, where incoming color indices are not properly validated. A malicious VNC server can exploit this flaw by sending crafted messages with out-of-range values, leading to an out-of-bounds

Why this priority

  • Critical severity
  • CISA SSVC: automatable with total technical impact
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance1.1% (top 34%)
CISA exploited listNo
WeaknessCWE-122
Published2026-07-20
Last modified2026-10-24
Publisher (CNA): GitHub, Inc. · Vendor: neutrinolabs

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

Am I affected?

Timeline

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.

Exact fixes by distribution

Fedora 46 · conda · FIXED · 26.9.4-2.fc46 · FEDORA-2026-09931756f1 · source
sudo dnf upgrade --advisory=FEDORA-2026-09931756f1
Debian 12 · xrdp · FIXED · 0.9.21.1-1+deb12u3
sudo apt update && sudo apt install --only-upgrade xrdp dpkg --compare-versions "$(dpkg-query -W -f='${Version}' xrdp)" ge "0.9.21.1-1+deb12u3" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · xrdp · FIXED · 0.10.1-3.1+deb13u2
sudo apt update && sudo apt install --only-upgrade xrdp dpkg --compare-versions "$(dpkg-query -W -f='${Version}' xrdp)" ge "0.10.1-3.1+deb13u2" && echo PATCHED || echo STILL-VULNERABLE
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-2026-41252?

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

Is CVE-2026-41252 being exploited?

CVE-2026-41252 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-2026-41252 affect?

CVE-2026-41252 affects xrdp. Severity is critical (CVSS 9.8). xrdp is an open source RDP server. Versions 0.10.6 and prior contain a missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map me

How urgent is CVE-2026-41252?

Priority 59/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

WinRM and RDP vulnerabilities

Related CVEs

References

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