We released a software update for iOS 15 and iOS 16 on March 11, 2026, to extend protection to older devices that cannot update to the latest version of iOS. Devices with iOS 13 or iOS 14 must update to iOS 15 to receive these protections and will receive an additional alert to install a Critical Security Update in the next few days.

“Security researchers recently identified web-based attacks that target out-of-date versions of iOS through malicious web content,” the support document reads. “For example, if you’re using an older version of iOS and were to click a malicious link ...

"Background Security Improvements" is Apple's new way of installing security updates.

Apple has released iOS 15.8.7 and iPadOS 15.8.7 for its older devices, which are security patches addressing the Coruna exploit.