Forbes: Hacker Claims He Can ‘Turn Off 25,000 Cars’ At The Push Of A Button

"Every day millions of us rely on tech to protect our cars from thieves. Immobilizers, for instance, ensure only the owner of the right key fob can start the vehicle.  But now that technology has become a security threat, after hackers told Forbes they could lock down up to 25,000 cars at once. It's all thanks to a vulnerability (now fixed) that made it frighteningly simple to quickly take remote control of a car’s immobilizer and prevent drivers from starting their vehicle."

https://www.forbes.com/sites/thomasbrewster/2019/08/25/hacker-claims-he-can-immobilize-25000-cars-at-the-push-of-a-button/