PT-2026-33505 · Neutrinolabs · Xrdp

Published 2026-04-17 · Updated 2026-04-17 · CVE-2026-33145

NVD

CVSS v3.1

6.3

Medium

AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

xrdp is an open source RDP server. Versions through 0.10.5 allow an authenticated remote user to execute arbitrary commands on the server due to unsafe handling of the AlternateShell parameter in xrdp-sesman. When the AllowAlternateShell setting is enabled (which is the default when not explicitly configured), xrdp accepts a client-supplied AlternateShell value and executes it via /bin/sh -c during session initialization. This results in shell-interpreted execution of unsanitized, user-controlled input. This behavior effectively provides a scriptable remote command execution primitive over RDP within the security context of the authenticated user, occurring prior to normal window manager startup. This can bypass expected session initialization flows and operational assumptions that restrict execution to interactive desktop environments. This issue has been fixed in version 0.10.6.

Fix

OS Command Injection

Weakness Enumeration

CWE-78

Related Identifiers

CVE-2026-33145

Affected Products

Xrdp

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-33145 · Security Note
• https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-rmvv-7633-fg7h · Note
• https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6 · Note