This back door was found by testing the ports with telnet. By running through each open port 

individually I managed to find a hole that obviously the creators have made. This allows you to 

remotely access the router and manipulate the features and find information.

Typically the router would have ports 23 (telnet) and port 244. When you telnet the port on 23 

you are greeted with a login prompt. This would require a hacker to key in a password. Further 

accessing the router on port 244, you are again greeted with this login prompt. However, the 

difference is that you do not need a password, you can simply press enter to login.

Once access is granted the flaw can lead a hacker to access data and possibly plant and sniff  

traffic on the modem. Also, the hacker can reset the router. There are other features 

that can be found that maybe of interest such as the cache and other data. and is potentially a 

high-risk flaw.

The exact version of the modem is still to be found, however this is currently seen in the many 

of the latest ADSL Road Runner modems in the Annex A family.