wifi password change

Do you have a Cox gateway? If so, see here. If not, what model router do you have?

Depending on your router, the solution may be different.

Try opening your web browser and going to the following page.

Routerlogin.net - Username is admin - Password is password

you can also try using your web browser, and in the address bar, go to 192.168.0.1

same username and password as above. Hope this helps!