Researchers at Pen Test Partners revealed in a proof of concept (PoC) that they were able to exploit vulnerabilities in two high-end "smart" alarms.

In their PoC, the pen testers debunked third-party car alarm vendors' claim to be the solution to key relay attacks on keyless-entry cars.

“We have shown that fitting these alarms can make your vehicle EVEN LESS SECURE! These alarms can expose you to hijack, may allow your engine to be stopped whilst driving and it may even be possible to steal vehicles as a result,” researchers wrote.

Despite reportedly having advertised that its solution was unhackable, attackers were able to hijack the app.