The MQTT protocol is used to interconnect devices with different protocols so they can they can be controlled via smart home hubs. Avast found more than 49,000 of those misconfigured servers in the U.S. 32,000 had no password to protect them. Cyber thugs could gain complete access to a home and do things like manipulate entertainment systems, voice assistants, household devices, and physically open smart doors, Avast security researcher Martin Hron wrote.”]