Honestly i cannot hack your cable modem but I have a suggestion for you. I recently purchased cable modem for myself and i was worried about security too. One of the things that you can do is buy a router that comes with a firewall. The router will have a different IP address that way you're hiding yours. If a person hacks you, all they're going to get is the router and not your personal files. Also, make sure that you change the password on the router as most hackers WILL try to guess the default password that comes with it and they WILL get it. Good Luck and enjoy the fast internet