A previously undiscovered flaw in the WhatsApp messaging application allowed an attacker to target human rights activists and lawyers by compromising mobile phones and installing commercial-grade spyware just by making a call. WhatsApp has not yet estimated the number of people affected. The attack shows the dangers of zero-day vulnerabilities, which are often sold to private companies and government agencies. The current exploit appears to be part of a spyware program called Pegasus, developed by Israeli cyber-offense firm NSO Group and sold to governments for surveillance purposes.”]
Source: https://www.darkreading.com/attacks-breaches/commercial-spyware-uses-whatsapp-flaw-to-infect-phones