The devices contain two hard coded user accounts with hardcoded passwords that allow an unauthenticated remote attacker for full control of the affected devices.
An unauthenticated local attacker can decrypt the devices config file and therefore compromise the device due to a weak implementation of the encryption used.
An unauthenticated remote attacker can perform a brute-force attack on the credentials of the remote service portal with a high chance of success, resulting in connection lost.
An unauthenticated remote attacker can get read access to files in the "/tmp" directory due to missing authentication.