iOS Bug Causes Specific Network Name to Disable Wi-Fi on iPhones
A wireless network naming bug has been discovered in iOS that effectively disables an iPhone's ability to connect to Wi-Fi.

Security researcher Carl Schou found that after joining a Wi-Fi network with the name "%p%s%s%s%s%n" his iPhone's Wi-Fi functionality was left "permanently disabled."
Changing a hotspot's SSID did nothing to correct the problem, with even a reboot failing to make a difference, according to BleepingComputer.
Other users who were able to replicate the issue have suggested the bug could be related to the initial use in the network name of the percentage sign, which leads to an input parsing issue whereby iOS mistakenly interprets the letters following the "%" as a string-format specifier.
In C and C-style languages, string format specifiers have a special meaning and are parsed by the language compiler as a variable name or a command instead of standard text.
Android phones don't seem to be affected by the same network, but iPhones hit by the problem need to have their network settings reset before a Wi-Fi hotspot can be connected again.
To perform the reset, open the Settings app, tap General -> Reset, then tap Reset Network Settings and confirm the request at the prompt.
Popular Stories
As the end of 2023 nears, now is a good opportunity to look back at some of the devices and accessories that Apple discontinued throughout the year. Apple products discontinued in 2023 include the iPhone 13 mini, 13-inch MacBook Pro, MagSafe Battery Pack, MagSafe Duo Charger, and leather accessories. Also check out our lists of Apple products discontinued in 2022 and 2021. iPhone Mini ...
Apple with iOS 17.1 and watchOS 10.1 introduced a new NameDrop feature that is designed to allow users to place Apple devices near one another to quickly exchange contact information. Sharing contact information is done with explicit user permission, but some news organizations and police departments have been spreading misinformation about how functions. As noted by The Washington Post,...
Apple will likely release iOS 17.1.2 this week, based on mounting evidence of the software in our website's analytics logs in recent days. As a minor update, iOS 17.1.2 should be focused on bug fixes, but it's unclear exactly which issues might be addressed. Some users have continued to experience Wi-Fi issues on iOS 17.1.1, so perhaps iOS 17.1.2 will include the same fix for Wi-Fi...
Cyber Week has taken the place of Black Friday, and you'll find some of the same deals still around for the next few days, although many from Black Friday have now expired. This includes dozens of record low prices on Apple products like AirPods, iPad, Apple Watch, MacBook, iPhone, and more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a...
Black Friday 2023 has officially ended, but we're still tracking some of the best deals of the year on Apple products like AirPods, iPad, iPhone, MacBook, and many more. Note: MacRumors is an affiliate partner with some of these vendors. When you click a link and make a purchase, we may receive a small payment, which helps us keep the site running. Specifically, in this article we're...
Top Rated Comments
That's why Apple should promptly fix the root issue before worse exploits have a chance to happen.