Complete guide, manuals, and troubleshooting for the XB8 (CGM4981COM) router.
To access the administration panel for your Xfinity XB8 (CGM4981COM) router, you need to be connected to its network. Follow the steps below:
Username: admin
Password: password
Note: If you have previously changed the password and forgotten it, you will need to perform a factory reset. See the Factory Reset tab for instructions.
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