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via Richard Patterson / Flickr

A spyware company has developed an easy way to take over any Apple computer, watch, or iPhone so the software giant is asking everyone to update their devices. The malicious software attacks Apple devices through the iMessage app.

"It's absolutely terrifying," said John Scott-Railton, a senior researcher at The Citizen Lab, the company that discovered the hack and reported it to Apple.

What's scary about the hack is that it doesn't require the victim to download or click on anything to take effect. A device can be taken over by simply receiving a message. In the cybersecurity industry, it's known as a "zero-click" exploit.

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