Apple Releases A Surprise Update For iPhones – Here’s Why You Should Install iOS 17.2.1 Right Now

OS 17.2.1 contains important bug fixes —it’s recommended for all users


(Tom’s Guide) In a rare move, Apple has just released an incremental iPhone update following the release of iOS 17.2 earlier this month.

As reported by Forbes, we don’t quite know whether or not iOS 17.2.1 fixes a particular security flaw that impacts the best iPhones since Apple didn’t include any information regarding vulnerabilities. However, in the update itself, Apple does say that it “provides important bug fixes” and “is recommended for all users.”


At the bottom of the update, there’s a link to an Apple support page and if you click on it, you’ll see that iOS 17.2.1 is either an Apple security update or one of the company’s Rapid Security Responses.

While there’s speculation online that this update fixes battery life problems on certain iPhone models, it could just be an update that needs to be ready for the holidays for anyone gifting iPhones to their loved ones.

At the same time though, iPhones have recently been the targets of many spyware attacks and the update could fix a critical vulnerability in the background that Apple isn’t quite ready to disclose. The company has been secretive about vulnerabilities in the past, so this wouldn’t surprise me in the slightest. Just to be clear, though, an Apple spokesperson has told us that there’s nothing to the update beyond what’s in the release notes, which make no mention of a security fix.

Either way, you’re going to want to update your iPhone as soon as possible and iOS 17.2.1 is available for the iPhone XS and later. You can check to see if the update is ready for your phone by going to Settings, then tapping on General and heading to Software Update.

You’re going to want to update your Mac, too

macOS Sonoma running on a Mac outside

(Image credit: Tom’s Guide)

One of the reasons I believe this surprise update may be more serious than Apple is currently letting on is due to the fact that the best MacBooks have also received an incremental update.

Just like with iOS 17.2, macOS Sonoma 14.2 was also released at the beginning of this month. However, in a separate support document from Apple, the company has revealed that macOS 14.2.1 fixes a critical vulnerability tracked as CVE-2023-42940.

The flaw itself is a session rendering issue that was discovered by Iconfactory’s Craig Hockenberry. While this vulnerability doesn’t seem like it can be exploited by hackers in their attacks, it could lead to incorrect content being shared when Mac users share their screen.

If you own a Mac along with an iPhone, it’s probably best to update both devices at the same time as soon as you can to avoid dealing with any potential issues that could arise.

How to keep your Apple devices secure

A padlock resting next to the Apple logo on the lid of a gold-colored Apple laptop.

(Image credit: robert coolen/Shutterstock)


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