Reset cable modem login

Thanks so much for taking the time to reach out to us through our business forums. I would love to assist you in resetting the login for the modem. Have you attempted the default passwords of highspeed or CantTouchThis? If these passwords still will not allow you to log in. I am more than happy to assist you further please reach out through private message with your first and last name, full service address and account number or phone number and we will get started? -Comcast_Michelle