Unable to log into VMG3925-B10C

Admin: admin

Password: using combinations of 1234, admin and blank

All do not let me log in? Username and passwords are invalid.

I've reset the router a few times now to no avail. I may have changed the admin and password in the past, and of course I don't remember them. However I believe reseting the router does indeed rest those.

Any information on how to access my router would be much appreciated.

Thank you