The default username is admin and the default password is motorola (all lowercase).

Motorola creates a firmware update to improve security or performance.

Your provider (e.g., Xfinity) tests the software on their specific network infrastructure to ensure compatibility.

You will likely see versions like 8611-19.2.20 or the newer 8611-21.3.7 . Troubleshooting Firmware-Related Connectivity Issues

Motorola MB8611 DOCSIS 3.1 Multi-Gig Cable Modem - Amazon.com