Apple issued security fixes for Mac OS X and Safari to patch zero-day flaws exploited by Pegasus spyware to spy on mobile users. The three vulnerabilities, dubbed Trident, exploited in the attack are: Information leak in kernel, memory corruption and memory corruption. Apple issued the updates for the El Capitan and Yosemite versions of iOS 9.3.5 update for its mobile devices (iPhones and iPads) to address the flaws, now has issued security updates also for the Safari Browser and OS X.”]
Source: https://securityaffairs.co/wordpress/50868/hacking/pegasus-tridend-exploit.html