Apple Backpatches Beta Security Fixes into macOS 26.6.2, iOS/iPadOS 26.6.1, and iOS/iPadOS 18.7.10

[ace (Adam Engst)]

Yes, for anything before macOS 14 Sonoma, you’re going to want to turn off Screen Sharing or make sure port 5900 is blocked.

Apple Fixes Screen Sharing Vulnerability in Tahoe, Sequoia, and Sonoma

I hope that this is not an issue on a home network behind a router/firewall. I use Screen Sharing on my Mac Studio (Sequoia) to connect to a headless MacPro5,1 that runs Mojave, Sierra, Mountain Lion, and Snow Leopard – and there are, of course, no updates for those legacy systems. Ars Technica now reports that this vulnerability is under active exploit.