Last month, I’ve changed the admin password for this modem. Originally it was username: tmadmin and password: tmadmin. This is the unrestricted account.

And now, I want to reboot the modem and I forgot that password! I’ve tried to login using tmuser but there’s no option to reboot the modem.

Cut to the chase, with just some HTML debugging using Chrome debugger, I found out that this modem wasn’t designed to be secured at all. The password is in plain text and the validation was done purely on the UI level.

Just go to http://192.168.1.1, and log in using as any user (tmadmin, tmuser or support). Then go to http://192.168.1.1/password.html. View the source and you’ll see something like this:

<script language="javascript">
<!-- hide
pwdUser = 'tmuser';
So, moral of story is: Even though you have changed password for the tmadmin user, it’s not enough. You will need to change the password for non-admin users such as tmuser or support, because this modem security is absolute joke.