Devolo dLAN® 550 duo+ Starter Kit is Powerlineadapter which is a cost-effective and helpful networking alternative for any location without structured network wiring. Especially in buildings or residences lacking network cables or where updating the wiring would be expensive and complicated, Powerline adapters provide networking at high transmission rates.
The devolo firmware has what seems to be a 'hidden' services which can be enabled by authenticated attacker via the the htmlmgr CGI script. This allows the attacker to start services that are deprecated or discontinued and achieve remote arbitrary code execution with root privileges.