The study discovered that virtual assistants like Siri respond to light waves in the same manner that they do to sound waves.
The researchers tested the hack for seven months on devices equipped with Google Home, Amazon's Alexa, and Apple's Siri, and found that they could send light commands up to hundreds of feet distant using anything from $14 laser pointers to flashlights.
A hacker can gain access to anything that accepts voice commands once they have taken control of a voice-activated assistant.