Tomtom Vio Hack

Late one Tuesday, Leo discovered the flaw. The VIO’s firmware update process used a weak, static handshake. By spoofing a TomTom server, he could inject a custom script. The script didn’t disable the device—that would trigger an alert. Instead, it put the VIO into a "synthetic mode." The real truck could be speeding through a red light, but the VIO would faithfully report a gentle cruise within all limits.