Is CVE-2026-42218 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-42218 being exploited in the wild.

How severe is CVE-2026-42218?

Medium severity, with a CVSS score of 5.3, published 20 July 2026.

Is there a fix for CVE-2026-42218?

A patch was published on 2026-07-06: Version 0.10.6.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-42218 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-42218?

Check whether you run Neutrinolabs Xrdp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-42218: neutrinolabs xrdp timing side-channel in login interface

CVE-2026-42218 · Severity: medium · CVSS 5.3 · Published 2026-07-20

xrdp is an open-source tool that allows users to remotely access a computer's desktop. A security flaw in the login screen allows an attacker to figure out which usernames exist on the system by measuring how long the server takes to respond to login attempts. This information can be used to facilitate more targeted attacks, such as password guessing or social engineering.

Technologies: Neutrinolabs Xrdp. Vendors: Neutrinolabs.

Quick answers

Is CVE-2026-42218 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-42218 being exploited in the wild.
How severe is CVE-2026-42218?: Medium severity, with a CVSS score of 5.3, published 20 July 2026.
Which products and versions are affected?: Neutrinolabs Xrdp <= 0.10.6.
Is there a fix for CVE-2026-42218?: A patch was published on 2026-07-06: Version 0.10.6.1 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-42218 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-42218?: Check whether you run Neutrinolabs Xrdp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A timing side-channel vulnerability (CWE-204) exists in the xrdp login interface due to observable response discrepancy. The server takes different amounts of time to process login requests depending on whether the provided username exists on the system. A remote, unauthenticated attacker can measure these processing time differences to verify valid usernames. This issue affects versions up to and including 0.10.6 and has been addressed in version 0.10.6.1.

Affected products

neutrinolabs xrdp <= 0.10.6

Timeline

2026-06-15: advisory: GitHub Security Advisory published
2026-07-06: patched: Version 0.10.6.1 released
2026-07-20: disclosed: CVE published to NVD

References

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