Apple Issues Major Warning to 800 Million iPhone Users

The Apple iPhone is the most popular mobile phone line in the United States and one of the most popular series of devices in the world with an estimated 1.6 billion iPhone users across the globe. Unfortunately, many of those users are now at risk.

Over the past few weeks, Apple has been issuing a warning about a security flaw that data shows would impact around half of those iPhone users, which is around 800 million.

Apple Issues Warning

Late last month, Apple began warning users of two critical flaws found in WebKit, which is the browser engine that powers Safari and all browsers on iOS. The flaws left iPhone users vulnerable an "extremely sophisticated attack" which would targeting specific individuals.

Apple said that the critical flaw could allow hackers to be able to take control of an iPhone or iPad by using malicious websites on the compromised web browsers and trick the device into executing harmful instructions.

The flaw left users vulnerable to hackers who could potentially take controll of the iPhone or iPad or run code without your permission, possibly obtaining passwords or payment information.

800 Million Devices are Vulnerable

The good news is that Apple has already created a patch to correct the vulnerability in its latest software update. However, those that have not installed the software update are vulnurable.

Forbes estimates that 50% of all eligible iPhone users have yet to upgrade from iOS 18 to iOS 26. Given that there are more than 1.6 billion iPhone users worldwide, this means that around 800 million devices are still vulnerable. StatCounter has an even more pessimistic view, estimating that just 20% of users have upgraded, which would leave more than 1.2 billion iPhone users vulnerable.

According to Apple, the devices most at risk include the iPhone 11 and later, the iPad Pro 12.9-inch (3rd generation and later), and the iPad Pro 11-inch (1st generation and later). Other vulnerable models include the iPad Air (3rd generation and later), the iPad (8th generation and later), and the iPad mini (5th generation and later).

Only Way to Protect Yourself

Unfortunately, the only way to protect yourself from these vulnerabilities is upgrade to the latest version of iOS, which is iOS 26.2.

While it was expected that Apple would make a security update for users wanting to stick with iOS 18 for a bit longer, that is no longer the case, as iOS 18.7.3 is not available unless you’re running an iPhone that can’t run iOS 26.

“There’s no workaround or user behavior that meaningfully mitigates this risk,” says Keeper Security’s Darren Guccione, via Forbes.

He went on to explain that upgrading to the latest version of the software is "the only effective defense. Once patches are public, the exposure window widens for anyone who delays updating.”

The good news is that installing the update is easy. In fact, for users with automatic updates enabled, the software should be up to date and the patch should already be installed.

If you do not have automatic updates enabled, you will need to manually download iOS 26.2 or iPadOS 26.2 through their device settings. In this case, users should simply open the "settings" app then click "general" followed by "software update."