Pingtel xpressa SIP-based voice-over-IP phone 1.2.5 through 1.2.7.4 does not require administrative privileges to perform a firmware upgrade, which allows unauthorized users to upgrade the phone.
Pingtel xpressa SIP-based voice-over-IP phone 1.2.5 through 1.2.7.4 allows attackers with physical access to restore the phone to factory defaults without authentication via a menu option, which sets the administrator password to null.