Observable Response Discrepancy in xrdp - CVE-2026-42218
Published: June 15, 2026
Vulnerability identifier: #VU134543
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-42218
CWE-ID: CWE-204
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: neutrinolabs
Affected software:
xrdp
xrdp
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information via username enumeration.
The vulnerability exists due to observable response discrepancy in the login interface when processing authentication attempts. A remote attacker can measure response timing differences to disclose sensitive information via username enumeration.
How to mitigate CVE-2026-42218
Install security update from vendor's website.