A team at Columbia University discovered they could send fake firmware updates to some HP LaserJet printers, which included malicious instructions to take control of the printer.
They were able to copy the users' tax returns and other documents. They even commanded a printer to continuously heat up its ink-drying tool until the machine caught fire.
HP says there have been no actual cases of hacking, and that a thermal switch should kick in before the printers caught fire.
