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
The upcoming iOS 26.1 update includes a handful of new features and changes for iPhones, including a toggle for changing the appearance of the Liquid Glass design, "slide to stop" for alarms in the Clock app, and more.
Below, we outline key details about iOS 26.1.
Release Date
Given that Apple has yet to seed an iOS 26.1 Release Candidate, which is typically the final beta version, the...
Apple is about to drop iOS 26.1, the first major point release since iOS 26 was rolled out in September, and there are at least six notable changes and improvements to look forward to. We've rounded them up below.
Apple has already provided developers and public beta testers with the release candidate version of iOS 26.1, which means Apple will likely roll out the update to all compatible...
Apple is designing an updated version of the Apple TV 4K, and rumors suggest that it could come out sometime in the next couple of months. We're not expecting a major overhaul with design changes, but even a simple chip upgrade will bring major improvements to Apple's set-top box.
Subscribe to the MacRumors YouTube channel for more videos.
We've rounded up all the latest Apple TV rumors.
...
Apple today provided developers and public beta testers with the release candidate versions of upcoming iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, watchOS 26.1, and visionOS 26.1 updates for testing purposes. The RCs betas come a week after Apple released the fourth betas.
The new betas can be downloaded from the Settings app on a compatible device by going to General > Software...
Apple this month refreshed the 14-inch MacBook Pro base model with its new M5 chip, and higher-end 14-inch and 16-inch MacBook Pro models with M5 Pro and M5 Max chips are expected to follow in early 2026. However, these machines will represent the final update to the current design, with Apple reportedly developing a completely new version of the MacBook Pro packed with next-generation hardware...
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max.
One thing worth...
Apple today provided developers and public beta testers with the release candidate version of macOS Tahoe 26.1, which means the update will likely see a public launch next week.
The release candidate includes notes on what's in the update, so we have a full picture of the new features that Apple has included.
macOS Tahoe 26.1 adds AutoMix support over AirPlay, improved FaceTime audio...
Rumors are stoking excitement for the next-generation iPad mini that Apple is reportedly close to launching. So what should we expect from the successor to the iPad mini 7 that Apple released over a year ago? Read on to find out.
Processor and Performance
Apple is working on a next-generation version of the iPad mini (codename J510/J511) that features the A19 Pro chip, according to...
Apple is preparing to bring support for its digital car key feature to Jetour vehicles, according to evidence uncovered on Apple's backend by MacRumors contributor Aaron Perris.
Introduced in 2022, Car Keys allows an iPhone or Apple Watch to unlock a vehicle through the Wallet app. A digital version of a car key is stored in Wallet, and unlocking can be done by holding an Apple Watch or...
('https://www.macrumors.com/2025/05/12/apple-ios-18-5-c1-security-fix/')
