Apple released a security update for iOS 12 a couple of months ago [2], an operating system released a little over 4 years ago. I think you’re good.
And nothing this month which means it's already vulnerable to pretty much all of the vulnerabilities that got fixed. Some could be iOS 16 specific but the vast majority are not.
> Apple released a security update for iOS 12 a couple of months ago
And fixed a single vulnerability because it was actively exploited in the wild, leaving the OS with hundreds of other vulnerabilities unfixed.
Not arguing Apple should keep OS versions supported forever but the reality is that unless you're on the latest major version you're pretty much out of luck.
The fact that there hasn’t been a second security update for iOS 15 doesn’t mean another one isn’t coming which it almost certainly is.
unless you're on the latest major version you're pretty much out of luck
As I just mentioned, iOS 12, a 4-year old operating system got updated a couple of month ago and iOS 15 will continue getting updates obviously.
To put things in perspective, updating iOS 12 means devices as old as the iPhone 5s were updated. The iPhone 5s first shipped September 2013—over 9 years ago!
I suspect Android devices released 9 years ago haven’t been updated in a long long time.
Besides, by the summer of 2023, something like 80+% of the installed base will be on iOS 16, which is what happens every year. iOS 16 is already a little ahead of where iOS 15 installs were at the same time last year [1].
[1]: https://appleinsider.com/articles/22/09/14/ios-16-adoption-s...