Now this sounds needlessly complicated, but it doesn't make it any less impressive.
Researchers at French security organization ANSSI have discovered a security weakness in microphones attached to smarphones that allows them to control various functions via Siri.
By sending specific radio waves to a headset microphone connected to an iPhone, the French team (the would-be 'hackers') were able to simulate the signal usually given off if they were to hit the "press to speak" button - something they're describing as a "silent remote voice command injection technique".
From here they're able to simulate voice commands, accessing functions via Siri including opening apps, sending messages and even opening Apple Pay.
The technique can even be used on Android phones supporting the Google Now talk functions.
The point of the research is to prove that such security flaws exist, rather than suggesting that hackers might be out there at this very moment accessing your apps via radio waves.
However, should you notice anyone looking shifty pointing a small dish array at your earphones, you might want to unplug them.