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CVE-2026-33689

Neutrinolabs Xrdp out-of-bounds read

9.1 CRITICALEPSS 0.86%
  1. Published17 Apr 2026

Description

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 can lead to a denial-of-service (DoS) condition via a process crash or potential disclosure of sensitive information from the service's memory space. This issue has been fixed in version 0.10.6.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

Neutrinolabs Xrdp< 0.10.6

Remediation

Fixed in
Neutrinolabs Xrdp≥ 0.10.6

References

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Frequently asked

Is CVE-2026-33689 being actively exploited?

CVE-2026-33689 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.86%.

How severe is CVE-2026-33689?

CVE-2026-33689 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.86% probability of exploitation.

Which products are affected by CVE-2026-33689?

Affected products include Neutrinolabs Xrdp.

How do I fix CVE-2026-33689?

Upgrade affected software to a fixed version, for example Neutrinolabs Xrdp 0.10.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-33689 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.