TELESTAR Bobs Rock Radio, Dabman D10, Dabman i30 Stereo, Imperial i110, Imperial i150, Imperial i200, Imperial i200-cd, Imperial i400, Imperial i450, Imperial i500-bt, and Imperial i600 TN81HH96-g102h-g102 devices have an undocumented TELNET service within the BusyBox subsystem, leading to root access.
packetstormsecurity.com/files/154416/Dabman-And-Imperial-Web-Radio-Devices-Undocumented-Telnet-Backdoor.html
packetstormsecurity.com/files/174503/Internet-Radio-auna-IR-160-SE-UIProto-DoS-XSS-Missing-Authentication.html
seclists.org/fulldisclosure/2023/Sep/1
www.vulnerability-lab.com/get_content.php?id=2183