The BT Home Hub has now changed the default access password from admin to the serial number of the device, but allows retrieval of the number via a simple MDAP request in the same network.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66611/bthub-password.txt
Source: https://packetstormsecurity.com/files/66611/bthub-password.txt.html