In this video he discusses the TriangleDB attack chain that allowed hackers to completely compromise iPhones starting with a zero click exploit and ending with a bypass of Apples hardware based memory protection.
Read more about it from Kaspersky: https://securelist.com/triangledb-triangulation-implant/110050/
To summarise the video for you: “Yada, yada, yada… there’s a blog post that covers this better, you should check it out”