It is the most common scenario when you will require to crack the router password if you have changed your default password. The most common case is to perform a factory reset of the router, but if you perform a factory reset, then it will lose all your settings. So, the best alternative is to use a password finder application. The router password finder application helps in various things. Starting with, it helps to determine if the router uses basic authentication or some sort of custom form submission. You can try out the username and password combination one router one after the other. Next is, you can look for the page to come back that significantly looks different. Lastly, it will help to check whether you are logged in successfully or not.