If a cable modem has an unused console port, that port will most likely be accessible using a TTL-compatible interface.

I've heard from various people that it is possible to hack your cable modem and change settings etc.. Is it possible to telnet to a cablemodem? I have a Toshiba PCX100 from RaodRunner, if anyone ...

An expert on cable modem hacking has been arrested by federal authorities on computer intrusion charges.

The modem enabled free Internet access. Harris was open about his modding, even writing a book called “Hacking the Cable Modem” that has a cover photo of a modem meshed with an unlocked padlock.