The company released iOS 27.2.1 on Monday, Nov. 9, for iPhone 11 and later models, according to Apple’s security advisory. The update patches vulnerabilities affecting Messages, Bluetooth, AirPlay, and other system components.
Among the fixes are two involving iMessage group conversations.
One vulnerability could allow a remote attacker to join a group chat and receive its messages. A separate flaw could let someone added to a group access messages sent before they joined.
Apple says it addressed those issues through stronger authorization checks and removal of vulnerable code.
Other fixes concern connections between nearby devices.
An AirPlay flaw could let an attacker within Bluetooth range bypass limits on pairing-code attempts. Separate CoreUtils vulnerabilities could allow a malicious device to pair without the user’s interaction.
The release also addresses a Bluetooth issue that could corrupt process memory and an App Intents authorization flaw that could give an app access to sensitive user data.
Apple lists corresponding fixes for supported iPads, Apple Watches and laptops through iPadOS 27.2.1.
To check your iPhone, open Settings, tap General, and select Software Update. That screen shows the installed iOS version and whether an update is available.
Apple’s installation guide recommends backing up the device through iCloud or a computer before updating. Connect the phone to Wi-Fi, plug it into power, and follow the on-screen installation instructions.
If the update does not appear on the phone, Apple says users can update through a computer.
Owners can also manage automatic updates from the Software Update screen. Automatic installation allows the iPhone to download and install updates overnight while charging and connected to Wi-Fi, with a notification before installation.
Apple describes keeping software current as one of the most important steps users can take to maintain their devices’ security.
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