Re:ARRIS Cable Modem Has a Backdoor in the Backdoor
by johncolanduoni on Thursday November 19, 2015 @10:19PM
(#10599374)
I'm guessing they used Shodan to locate the models they knew were affected (i.e. by model numbers), not to try the backdoor on unsuspecting devices (which would be illegal).
It doesn't look like this is LAN-only.
Even if it were, an escalation from unprivileged code execution on a single device to MITM any connection out of a network hardly seems "low priority".