[Full-Disclosure] backdoor menu on conexant chipset dsl router (Zoom X3)

i have just installed an adsl modem sold under the brand of Zoom X3 http://www.zoom.com/products/adsloverview.html and was apalled to find that an nmap scan of the external address immediately came up with the following: PORT STATE SERVICE 23/tcp open telnet 80/tcp open http 254/tcp open unknown...