Rooxis RXR-12 Wi-Fi router contains an undocumented UID-0 backdoor account (dg) with a firmware-wide default password (ivanlee) and interac…

Rooxis RXR-12 Wi-Fi router contains an undocumented UID-0 backdoor account (dg) with a firmware-wide default password (ivanlee) and interactive shell (/bin/ash), allowing authentication as root via SSH or local console without device-specific secrets. Firmware 20260813_c2169ea5 removes the account from the shipped root filesystem and disables root password authentication in SSH. Users can update their router can be through the local web interface.