CVE-2026-42218: CWE-204: Observable Response Discrepancy in neutrinolabs xrdp
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.
AI Analysis
Technical Summary
CVE-2026-42218 describes a timing side-channel vulnerability in neutrinolabs xrdp (an open source RDP server) affecting versions up to and including 0.10.6. The vulnerability arises from observable discrepancies in response processing times during login attempts, enabling remote attackers to determine the existence of usernames on the system. This constitutes an information disclosure vulnerability classified under CWE-204 (Observable Response Discrepancy). The vulnerability does not affect confidentiality of other data, integrity, or availability. The issue has been addressed in version 0.10.6.1.
Potential Impact
An attacker can remotely perform username enumeration by measuring timing differences in login responses, leading to unauthorized disclosure of valid usernames on the system. This may facilitate further targeted attacks but does not directly compromise system integrity or availability.
Mitigation Recommendations
Upgrade xrdp to version 0.10.6.1 or later where this timing side-channel vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
CVE-2026-42218: CWE-204: Observable Response Discrepancy in neutrinolabs xrdp
Description
xrdp is an open source RDP server. Versions 0.10.6 and prior contain a timing side-channel vulnerability in the login interface. Due to a discrepancy in response processing times, a remote attacker can infer the existence of a username on the system, leading to unauthorized information disclosure via username enumeration. This issue has been fixed in version 0.10.6.1.
CVSS v3.1
Score 5.3medium
Affected software
pkg:github/neutrinolabs/xrdpRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-42218 describes a timing side-channel vulnerability in neutrinolabs xrdp (an open source RDP server) affecting versions up to and including 0.10.6. The vulnerability arises from observable discrepancies in response processing times during login attempts, enabling remote attackers to determine the existence of usernames on the system. This constitutes an information disclosure vulnerability classified under CWE-204 (Observable Response Discrepancy). The vulnerability does not affect confidentiality of other data, integrity, or availability. The issue has been addressed in version 0.10.6.1.
Potential Impact
An attacker can remotely perform username enumeration by measuring timing differences in login responses, leading to unauthorized disclosure of valid usernames on the system. This may facilitate further targeted attacks but does not directly compromise system integrity or availability.
Mitigation Recommendations
Upgrade xrdp to version 0.10.6.1 or later where this timing side-channel vulnerability has been fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-25T05:04:37.028Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a5e56f42a4a8d5989689f8e
Added to database: 07/20/2026, 17:12:20 UTC
Last enriched: 07/20/2026, 17:27:55 UTC
Last updated: 07/21/2026, 05:54:53 UTC
Views: 10
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