All ADB broadband gateways / routers based on the Epicentro platform are affected by a privilege escalation vulnerability where attackers can gain access to the command line interface (CLI) if previously disabled by the ISP, escalate their privileges, and perform further attacks.
packetstormsecurity.com/files/148430/ADB-Group-Manipulation-Privilege-Escalation.html
seclists.org/fulldisclosure/2018/Jul/19
www.securityfocus.com/archive/1/542118/100/0/threaded
www.exploit-db.com/exploits/44984/
www.sec-consult.com/en/blog/advisories/privilege-escalation-via-linux-group-manipulation-in-all-adb-broadband-gateways-routers/