Facebook reported a serious security breach on WhatsApp that allowed attackers to gain full access to all messages and files stored in the app. To achieve this, attackers could send a specially encoded MP4 video file so that it runs while viewing it with malicious code, exposing the device to such hacking.
In addition to gaining access to messages and files, attackers could also exploit the hack to disable the app or even the entire device.
The good news is that this loophole has already been fixed – the latest versions of the Android and iOS app are already protected. Of course, the recommendation is to update the app immediately to the latest version, if it has not been updated automatically already.
Currently, Facebook claims there is no indication that this breach was actually exploited by malicious sources. However, it should be noted that a few weeks ago, it sued the Israeli information security firm NSO for using tools it provided to the Indian government to break through the popular messaging app and track human rights activists and journalists in the country.