If you have an iPhone you need to update the software right away.
https://www.infosecurity-magazine.com/news/apple-patch-pegasus-spyware/
Apple has released an urgent update to patch a critical vulnerability that has been exploited by the notorious Pegasus mobile spyware.
The vulnerability, CVE-2021-30860, was discovered by researchers at University of Toronto’s Citizen Lab when analyzing the iPhone of an anonymous Saudi activist infected with NSO Group’s Pegasus spyware. They found a zero-day zero-click exploit against iMessage, which the team dubbed “FORCEDENTRY.” This exploit infected the device by targeting Apple’s rendering library, and was effective against Apple iOS, MacOS and WatchOS devices.
https://www.infosecurity-magazine.com/news/apple-patch-pegasus-spyware/