In May 2019, WhatsApp was attacked by hackers who put in spyware on a variety of victims' smartphones.[296] The hack, allegedly formulated by Israeli surveillance technological know-how organization NSO Group, injected malware on to WhatsApp end users' phones via a distant-exploit bug in the application's Voice over IP calling features. https://visionaryvault.de/wie-man-die-perfekte-whatsapp-gruppe-findet-ein-leitfaden/