Apple's C1 Modem Gets First Security Update in iOS 18.5
The iOS 18.5 update that Apple released today includes a security fix for the iPhone 16e's C1 modem, which is the first Apple-designed modem.
According to Apple's security support document for iOS 18.5, there's a fix for a vulnerability with the C1 modem. Apple says that it addressed a baseband security flaw that could allow an attacker "in a privileged network position" to intercept network traffic. Basically, a hacker that had access to cellular network infrastructure could potentially exploit the vulnerability for surveillance or to employ a man-in-the-middle attack.
The C1's baseband is used for signal processing, so it encodes and decodes data for communication between devices and networks, and processes calls, texts, and data connections. Apple addressed the vulnerability with improved state management, which could mean new validation checks to prevent attackers from exploiting weaknesses between operational states.
Apple released the iPhone 16e earlier this year, and today's security update is notable because it marks the first security flaw discovered and addressed in the C1 modem.
iOS 18.5 also includes several other security fixes for vulnerabilities with image processing, call history, Bluetooth, file parsing, FaceTime, Notes, ProRes, WebKit, and more. None of the vulnerabilities fixed today were known to have been actively exploited, but it's still a good idea to update right away.
Popular Stories
Apple today announced that its next-generation CarPlay experience, now dubbed "CarPlay Ultra" begins rolling out today, starting with Aston Martin vehicles.
Subscribe to the MacRumors YouTube channel for more videos.
CarPlay Ultra is now available with new Aston Martin vehicle orders in the U.S. and Canada. It will also be available for existing models that feature the brand's next-generation ...
Apple's recently announced CarPlay Ultra promises a deeply integrated in-car experience, but not all iPhone users will be able to take advantage of the new feature.
According to Apple's press release, CarPlay Ultra requires an iPhone 12 or later running iOS 18.5 or later. This means if you're using an iPhone 11, iPhone XR, or any older model, you'll need to upgrade your device to access...
Apple today announced the launch of CarPlay Ultra, the long-awaited next-generation version of its CarPlay software system for vehicles.
CarPlay Ultra features deep integration with a vehicle's instrument cluster and systems, built-in Radio and Climate apps, customizable widgets, and more. The interface is tailored to each vehicle model and automaker's identity, and drivers can also adjust...
President Donald Trump has asked Apple CEO Tim Cook to halt the company's manufacturing expansion in India, in a potential disruption of Apple's plan to shift iPhone production away from China.
"I had a little problem with Tim Cook yesterday," Trump said during his state visit to Qatar, according to Bloomberg. "He is building all over India."
"They [India] have offered us a deal where...
Apple this week introduced a new feature designed to allow prospective Apple Music users to import their saved music and playlists from third-party music services to Apple Music.
The feature is either in an expanded testing phase or it has started rolling out, and it is available in Australia and New Zealand according to an Apple Support document. Signs of the transfer option first surfaced...
The first videos of Apple's CarPlay Ultra experience are now available, providing a never-before-seen look at the long-anticipated iPhone-linked infotainment software.
British automaker Aston Martin today shared the first video of Apple's CarPlay Ultra experience in-action, followed by a detailed walk-through of the CarPlay Ultra system on Top Gear's YouTube channel, which provides the...
Apple today released iOS 18.5 and iPadOS 18.5, the fifth updates to the iOS 18 and iPadOS 18 operating systems that came out last September. iOS 18.5 and iPadOS 18.5 come a little over a month after Apple released iOS 18.4 and iPadOS 18.4.
The new software can be downloaded on eligible iPhones and iPads over-the-air by going to Settings > General > Software Update. The iOS 18.5 update has a...
On Friday, Epic Games submitted Fortnite to the U.S. App Store, and since then, we've been waiting to see if Apple would approve the game and allow it back on the iPhone and the iPad. There's been no word from Apple so far, but Epic Games opted to pull its first App Store review request, and has now resubmitted Fortnite.
Fortnite leaker Shiina shared the news, with the information reposted by...
('https://www.macrumors.com/2025/05/12/apple-ios-18-5-c1-security-fix/')
