Threats Tagged 'cve-2026-55626'

A heap-based buffer overflow vulnerability exists in neutrinolabs xrdp versions 0.10.6 and prior when operating in vnc-any mode. The flaw arises from missing bounds checks on color map messages from a VNC server, allowing crafted out-of-range values to cause out-of-bounds heap writes. This can lead to denial of service or remote code execution before authentication. The issue is fixed in version 0.10.6.1.

xrdp is an open source RDP server. In versions 0.10.6 and prior, when an authenticated user session is initialized using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched with insufficient authentication mechanisms. A local authenticated attacker could exploit this vulnerability to bypass intended session isolation, allowing them to unauthorizedly view or control the active desktop sessions of other users on the same system. Users using other backends, such as xorgxrdp or Xvnc over TCP sockets, are not affected. This issue has been fixed in version 0.10.6.1.