Vulnerability · Published Jul 20, 2026 · Assigned by GitHub_M
CVE-2026-42218XRDP is vulnerable to a server timing attack, leading to user enumeration
Medium 5.3
In plain English
A medium-severity security flaw in xrdp from neutrinolabs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | xrdp | 0.10.1-3.1+deb13u2 | DEBIAN-CVE-2026-42218 |
| Debian:14 | xrdp | 0.10.6.1-2 | DEBIAN-CVE-2026-42218 |
| Ubuntu:22.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-42218 |
| Ubuntu:24.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-42218 |
| Ubuntu:25.10 | xrdp | no fix listed | UBUNTU-CVE-2026-42218 |
| Ubuntu:26.04:LTS | xrdp | no fix listed | UBUNTU-CVE-2026-42218 |
| Ubuntu:26.10 | xrdp | no fix listed | UBUNTU-CVE-2026-42218 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| neutrinolabs | xrdp | < 0.10.6.1 |
Weakness: CWE-204 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
References
- https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3wr5-fwmh-qh34 x_refsource_CONFIRM
- https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1 x_refsource_MISC