Apple's security page has detailed information on
the security flaws addressed, but the gist of it is this: There are
quite a few components of iOS that have vulnerabilities that, when
exploited, could allow for arbitrary code execution. Sometimes with
kernel privileges. In one case, Apple notes that it is aware of a
report that this issue may have been actively exploited.
In other words, Apple has fixed several very serious
security flaws that could let hackers really mess with you
and your data. And hackers have already probably exploited one of
How to get iOS
To update your iPhone, open Settings, then tap on General, then
Software Update. If you're still on iOS 14, you'll see the option
to update to 14.8.1.
You'll also see the option to update to iOS 15 (but you aren't
required to update). The latest version, iOS 15.1, includes these same security