Apple has issued iOS 26.0.1 and iOS 18.7.1, along with a warning to update your iPhone now. That’s because both iOS 26.0.1 and iOS 18.7.1 address a single security vulnerability in the iPhone maker’s operating system.
Apple doesn’t give much detail about what’s fixed in iOS 26.0.1 and iOS 18.7.1, to allow as many iPhone users as possible to update before attackers can get hold of the information.
However, iOS 26.0.1 and iOS 18.7.1 both fix the same security flaw in FontParser — a part of Apple’s operating system that processes font files — which could see unexpected app termination or corrupted process memory, if an iPhone user processes a maliciously crafted font. Tracked as CVE-2025-43400, the out-of-bounds write issue was addressed with improved bounds checking, according to Apple’s support page.
iOS 26.0.1 Fixes Bugs In the iOS 26 Update
When a new iPhone software is released, it will inevitably include bugs. However, those who already updated to iOS 26 will find many of the issues are fixed in the latest iOS 26.0.1 update. The iOS 26.0.1 upgrade apparently squashes bugs including issues with the iPhone’s Wi-Fi impacting iPhone 17 models.
Why You Should Update To iOS 26.0.1 Or iOS 18.7.1Now
The single issue patched in iOS 26.0.1 and iOS 18.7.1 has not been used in real-life attacks yet. But it’s still a good idea to update now — especially if you want to fix any bugs in iOS 26.
At the moment, you can still choose which iPhone upgrade to apply.
iOS 26.0.1 is available for iPhone 11 and later, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 8th generation and later, and iPad mini 5th generation and later.
Meanwhile, iOS 18.7.1 is available for iPhone XS and later, iPad Pro 13-inch, iPad Pro 12.9-inch 3rd generation and later, iPad Pro 11-inch 1st generation and later, iPad Air 3rd generation and later, iPad 7th generation and later, and iPad mini 5th generation and later.
So, what are you waiting for? Go to your Settings > General > Software Update and download and install iOS 26.0.1 or iOS 18.7.1 now.
