Facebook has issued a security advisory for a zero-day WhatsApp vulnerability that allowed hackers to install spyware that could listen in on calls, read messages and switch on the camera. The vulnerability is now fixed, which means that if youre one of WhatsApps 1,500,000,000 users you need to go to the well and drink up the latest version of the app. Facebook has done the digital equivalent of pinning the vulnerability to the back of the toilet door in an unlit basement while nobody was looking.”]