What is the security update?

Hello!

Rapid Security Response are iOS updates that correct certain errors or security flaws. These interventions offer important security improvements between software updates. They provide important security improvements between software updates, such as improvements to the Safari web browser, the webkit framework set, or other important system libraries. They can also be used to more quickly limit some security issues, such as those that may have been exploited or reported as existing.

Apple introduced them with new versions of iOS 16.

I hope this answers your question!

On further note, according to the Apple Insider podcast:

(On the topic of iOS 16.5.1 (c))

“…and should be applied as soon as possible, since it addresses Web Kit vulnerabilities that are actively being exploited.”

Hello Caligula54!

We do not really know. However, you may learn something by reading this: What Are Rapid Security Response Updates? - Apple Community.

I hope this is helpful. Good Luck!