“Your car, in some sense, is only as secure as the least secure Internet-connected gadget you plug into it: Researchers proved as much last summer when they hacked a Corvette’s brakes via a cellular-enabled insurance dongle attached to the sportscar’s dashboard. Now another hacker has found that those digital accessories may have left another, bigger class of automobile vulnerable to the same sort of over-the-internet intrusion: industrial vehicles like buses, trucks, and ambulances.”
Source: Thousands of Trucks, Buses, and Ambulances May Be Open to Hackers | WIRED