https://www.cnet.com/news/apples-facetime-bug-was-discovered-by-a-teen-playing-fortnite/

He first reported the bug to his mother, a lawyer in Arizona, who spent the last week trying to warn Apple about its FaceTime security flaw before the bug became widely known.

Apple users were vulnerable to a major bug that allowed people to listen in on FaceTime calls before the recipient answered the call.