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On Monday 13 May, Facebook revealed that an “advanced cyber actor” has been spying on some users of its ridiculously popular WhatsApp messaging app, thanks to a zero-day vulnerability that allowed hackers to install spyware, silently, just by calling a victim’s phone.

The vulnerability is now fixed, which means that if you’re one of WhatsApp’s 1,500,000,000 users you need to go to the well and drink up the latest version.

There’s a good chance your app’s already updated itself, but this is a serious vulnerability so we advise you to check all the same.

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