iOS 27 Security Update

What iOS 27 Fixes

iOS 27 and iPadOS 27, released September 14, 2026, fixes 163 vulnerabilities in 85 parts of the system, according to Apple's security advisory.

Apple does not say that any of them were exploited before the fix. That makes iOS 27 a routine security update: worth installing soon, not an emergency.

It has since been superseded: the newest security release for iOS 27 is iOS 27.2 and iPadOS 27.2, from October 26, 2026, which includes these fixes.

Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.

Which Devices Get iOS 27

Apple lists iOS 27 and iPadOS 27 for: iPhone 11 and later, iPad Pro 12.9-inch 4th generation and later, iPad Pro 11-inch 2nd generation and later, iPad Air 4th generation and later, iPad 9th generation and later, and iPad mini 6th generation and later.

The iOS 27 release page has its build numbers and release history.

How to Install iOS 27

On the iPhone, open Settings → General → Software Update. If more than one update is offered, the one with the higher version number is the current release; the other is for people who want to stay on the previous major version.

Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past iOS 27 there is nothing to do.

Every Fix in iOS 27

All 163 CVEs in Apple's advisory, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.

• AVEVideoEncoder

  A sandboxed app may be able to execute arbitrary code with kernel privileges

  A race condition was addressed with improved state management.

  CVE-2026-84607

• Bluetooth

  A remote attacker may be able to cause unexpected app termination or arbitrary code execution

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-65414

• Core Bluetooth

  An attacker with a paired Bluetooth device may be able to execute arbitrary code

  A stack overflow was addressed with improved input validation.

  CVE-2026-86919

• CoreMedia

  Processing a maliciously crafted image may lead to arbitrary code execution

  A memory corruption issue was addressed by removing the vulnerable code.

  CVE-2026-64752

• ImageIO

  Processing a maliciously crafted image may lead to arbitrary code execution

  An integer overflow was addressed with improved input validation.

  CVE-2026-64759

• Kernel

  An app may be able to execute arbitrary code with kernel privileges

  A use after free issue was addressed with improved memory management.

  CVE-2026-86916

• WebKit

  Processing maliciously crafted web content may lead to arbitrary code execution

  A type confusion issue was addressed with improved state management.

  CVE-2026-86922

• APFS

  An app may be able to cause unexpected system termination or write kernel memory

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84523

• Apple Neural Engine

  An app may be able to cause unexpected system termination or write kernel memory

  A race condition was addressed with additional validation.

  CVE-2026-84634

• Baseband

  An attacker in a privileged network position may be able to cause a denial-of-service

  A denial-of-service issue was addressed with improved input validation.

  CVE-2026-86963

• CoreMedia

  A sandboxed process may be able to circumvent sandbox restrictions

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-86876

• CoreML

  A sandboxed app may be able to access restricted files

  A permissions issue was addressed with improved path validation.

  CVE-2026-84624

• Foundation

  A malicious app may be able to break out of its sandbox

  A race condition was addressed with additional validation.

  CVE-2026-86961

• Heimdal

  An attacker in a privileged network position may be able to modify network traffic

  A cryptographic issue was addressed with improved integrity checks.

  CVE-2026-84533

• IOMobileFrameBuffer

  An app may be able to cause unexpected system termination or corrupt kernel memory

  An out-of-bounds access issue was addressed with improved bounds checking.

  CVE-2026-65398

• iWork

  A malicious app may be able to break out of its sandbox

  A permissions issue was addressed with additional restrictions.

  CVE-2026-65354

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-28968

• Kernel

  A local attacker may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-84566

• Kernel

  A local user may be able to cause unexpected system termination or read kernel memory

  A race condition was addressed with additional validation.

  CVE-2026-65415

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  A double free issue was addressed with improved memory management.

  CVE-2026-84561

• Kernel

  An app with root privileges may be able to read uninitialized kernel memory

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-84622

• Kernel

  A malicious app may be able to gain root privileges

  A permissions issue was addressed with additional restrictions.

  CVE-2026-43689

• Kernel

  Connecting to a malicious NFS server may disclose kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-43687

• Kernel

  Connecting to a malicious NFS server may lead to kernel memory corruption

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-43686

• Kernel

  An app may be able to determine kernel memory layout

  A memory initialization issue was addressed with improved memory handling.

  CVE-2026-65405

• Kernel

  An app may be able to disclose kernel memory

  An information disclosure issue was addressed with improved memory management.

  CVE-2026-84530

• Kernel

  A local user may be able to cause unexpected system termination or read kernel memory

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-65359

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  A race condition was addressed with improved state handling.

  CVE-2026-84507

• Kernel

  An app may be able to disclose kernel memory

  An out-of-bounds read was addressed with improved input validation.

  CVE-2026-86903

• Kernel

  An app may be able to cause unexpected system termination or corrupt kernel memory

  The issue was addressed with improved memory handling.

  CVE-2026-84599

• MediaRemote

  A sandboxed app may be able to access the System Keychain

  An authorization issue was addressed with improved state management.

  CVE-2026-84628

• Security

  An app may be able to break out of its sandbox

  The issue was addressed with improved checks.

  CVE-2026-65363

• Telephony

  An attacker in a privileged network position may be able to bypass IPSec authentication and intercept network traffic

  An authentication issue was addressed with improved state management.

  CVE-2026-65329

• Accessibility

  An app may be able to access sensitive user data

  This issue was addressed with improved data protection.

  CVE-2026-43664

• Accounts

  A malicious application may be able to bypass Privacy preferences

  An authorization issue was addressed with improved state management.

  CVE-2026-65404

• App Intents

  An app may be able to access sensitive user data

  A privacy issue was addressed with improved access restrictions.

  CVE-2026-84582

• Apple Account

  An app may be able to use the Sign In With Apple authentication flow to access the user's Apple Account

  An authentication issue was addressed with improved state management.

  CVE-2026-20683

• Apple Intelligence

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-86920 CVE-2026-86955

• Authentication Services

  An app may be able to delete credentials stored in Keychain

  This issue was addressed by removing the vulnerable code.

  CVE-2026-86905

• BackgroundAssets

  An app may be able to access sensitive user data

  A logic issue was addressed with improved validation.

  CVE-2026-65406

• Camera

  An app may be able to access sensitive user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-86878

• copyfile

  An archive may be able to bypass Gatekeeper

  A file quarantine bypass was addressed with additional checks.

  CVE-2026-65399

• CoreMotion

  An app may be able to access motion data from headphones without user consent

  An authorization issue was addressed with improved validation.

  CVE-2026-43737

• Image Capture

  An app may be able to access user-sensitive data

  A path handling issue was addressed with improved validation.

  CVE-2026-64756

• IOSurfaceAccelerator

  An app may be able to leak sensitive kernel state

  An information leakage was addressed with additional validation.

  CVE-2026-64760

• Kernel

  A remote attacker may be able to bypass firewall rules

  This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org.

  CVE-2019-5598

• Managed Configuration

  An app may be able to access sensitive user data

  A privacy issue was addressed with improved handling of files.

  CVE-2026-86883

• MediaRemote

  An app may be able to access sensitive user data

  This issue was addressed with additional entitlement checks.

  CVE-2026-86880

• MobileBackup

  An attacker with physical access to a trust-paired device may be able to read and write arbitrary files

  A path traversal issue was addressed with improved path validation.

  CVE-2026-84598

• Music

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-84615

• NetworkExtension

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-43695

• Photos Storage

  An app may be able to access sensitive user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-84491

• Reminders

  An app may be able to access sensitive user data

  This issue was addressed with improved checks.

  CVE-2026-65403

• Safe Browsing

  An app may be able to access sensitive user data

  This issue was addressed with additional entitlement checks.

  CVE-2026-86897

• Sandbox

  An app may be able to bypass network restrictions

  A logic issue was addressed with improved validation.

  CVE-2026-84551

• Sandbox Profiles

  An app may be able to access sensitive user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-84603

• Security

  An app may be able to access protected user data

  This issue was addressed with improved validation of the caller's access.

  CVE-2026-84508

• Siri

  An app may be able to access sensitive user data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-86884

• Siri

  An attacker with physical access may be able to access contacts from the lock screen

  A logic issue was addressed with improved checks.

  CVE-2026-84614

• Siri Suggestions

  An attacker with physical access to a locked device may be able to view sensitive user information

  A logic issue was addressed with improved checks.

  CVE-2026-86890

• Spotlight

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved access control.

  CVE-2026-84621

• Storage

  An app may be able to access user-sensitive data

  A permissions issue was addressed with additional restrictions.

  CVE-2026-65345

• Symptom Framework

  A malicious application may be able to determine a user's current location

  A privacy issue was addressed with improved private data redaction for log entries.

  CVE-2026-84513

• Sync Services

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-86976

• TCC

  An app may be able to access sensitive user data

  A logging issue was addressed with improved data redaction.

  CVE-2026-84527

• Time Zone

  An app may be able to bypass certain Privacy preferences

  A privacy issue was addressed by removing sensitive data.

  CVE-2026-86887

• UIKit

  An app may be able to access sensitive user data

  A logic issue was addressed with improved state management.

  CVE-2026-84594

• Wallet

  An attacker with physical access to a locked device may be able to bypass Digital ID authentication when iPhone Mirroring is active

  This issue was addressed through improved state management.

  CVE-2026-84490

• Watch App

  An app may be able to track users across apps and websites without permission

  A privacy issue was addressed with improved state management.

  CVE-2026-86904

• WebKit

  Processing maliciously crafted web content may disclose sensitive user information

  A permissions issue was addressed by removing the vulnerable code.

  CVE-2026-64753

• Wi-Fi

  An attacker with physical access to an unlocked device may be able to view Wi-Fi passwords without authentication

  An authentication issue was addressed with improved state management.

  CVE-2026-43674

• Wi-Fi Connectivity

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-84636

• XPC

  An app may be able to access sensitive user data

  An authorization issue was addressed with improved state management.

  CVE-2026-84617

• WebKit

  Opening a maliciously crafted webarchive file may lead to universal cross-site scripting

  A logic issue was addressed with improved state management.

  CVE-2026-86898

• Accelerate Framework

  Processing a maliciously crafted image may lead to unexpected process termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-86882

• Accelerate Framework

  Processing a maliciously crafted image may lead to unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-86918

• Apple Neural Engine

  An app may be able to cause unexpected system termination

  An integer overflow was addressed with improved input validation.

  CVE-2026-65408

• Apple Neural Engine

  An app may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84595

• AppleAVD

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-65407

• AppleDouble

  Mounting a disk image with maliciously crafted files may lead to unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84519

• AppleKeyStore

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-84593

• AVEVideoEncoder

  An app may be able to cause unexpected system termination

  The issue was addressed with improved checks.

  CVE-2026-65410

• AVEVideoEncoder

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-84616

• Baseband

  An attacker in radio range may be able to cause unexpected system termination

  An input validation issue was addressed with improved input validation.

  CVE-2026-86885

• Baseband

  A remote attacker may be able to cause a denial-of-service

  A denial-of-service issue was addressed with improved input validation.

  CVE-2026-86879

• Bluetooth

  An attacker in radio range may be able to cause unexpected system termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84613

• CoreMedia

  Processing a maliciously crafted video file may lead to unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-65344

• CoreMedia

  Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory

  A use after free issue was addressed with improved memory management.

  CVE-2026-86913

• CoreText

  Processing web content may lead to a denial-of-service

  A null pointer dereference was addressed with improved input validation.

  CVE-2026-65412

• CoreUI

  Processing a maliciously crafted file may lead to unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84575

• CoreUI

  An app may be able to cause a denial of service

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84489

• CoreUI

  Processing a maliciously crafted image may lead to unexpected app termination

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84571

• CoreUI

  Processing a maliciously crafted asset catalog may lead to unexpected process termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84511

• Disk Images

  An app may be able to cause unexpected system termination

  The issue was addressed with improved memory handling.

  CVE-2026-84552

• exFAT

  Mounting a maliciously crafted volume may lead to unexpected system termination

  A heap buffer overflow was addressed with improved bounds checking.

  CVE-2026-84510

• Filters

  Processing a maliciously crafted file may lead to unexpected app termination

  A memory corruption issue was addressed with improved input validation.

  CVE-2026-43688

• FontParser

  Processing a maliciously crafted font file may lead to unexpected app termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-84524

• Foundation

  An app may be able to cause a denial of service

  A type confusion issue was addressed with improved memory handling.

  CVE-2026-65409

• Graphics

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-84492

• Heimdal

  An app may be able to cause a denial-of-service

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-86942

• ImageIO

  Processing a maliciously crafted image may result in memory corruption

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-64750 CVE-2026-65395

• ImageIO

  Processing a maliciously crafted image may lead to unexpected process termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-86975

• ImageIO

  Processing a maliciously crafted image may lead to unexpected app termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-86954

• IOKit

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-28969

• Kernel

  An app may be able to cause unexpected system termination

  A race condition was addressed with improved state handling.

  CVE-2026-84630 CVE-2026-65360 CVE-2026-65358

• Kernel

  An app may be able to cause unexpected system termination

  A memory corruption issue was addressed with improved memory handling.

  CVE-2026-65377

• Kernel

  An app may be able to cause unexpected system termination

  A use after free issue was addressed with improved memory management.

  CVE-2026-84521 CVE-2026-65402

• Kernel

  An app may be able to cause unexpected system termination

  A type confusion issue was addressed with improved checks.

  CVE-2026-84602

• Kernel

  An app may be able to cause unexpected system termination

  A double free issue was addressed with improved memory management.

  CVE-2026-86962

• Kernel

  An app may be able to cause unexpected system termination

  A null pointer dereference was addressed with improved input validation.

  CVE-2026-86964

• libarchive

  Processing a maliciously crafted file may lead to unexpected app termination

  A heap buffer overflow was addressed with improved bounds checking.

  CVE-2026-86870

• Messages

  Processing a maliciously crafted image may lead to unexpected process termination

  An input validation issue was addressed with improved input validation.

  CVE-2026-86959

• MobileAccessoryUpdater

  Connecting a malicious accessory may cause unexpected system termination

  A memory corruption issue was addressed with improved input validation.

  CVE-2026-86924

• Model I/O

  Opening a maliciously crafted file may lead to unexpected process termination

  A buffer overflow was addressed with improved size validation.

  CVE-2026-84497

• RawCamera

  Processing a maliciously crafted image may lead to heap corruption

  A buffer overflow was addressed with improved bounds checking.

  CVE-2026-84627

• RealityKit

  Processing a maliciously crafted file may lead to unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-28966

• RealityKit

  Opening a maliciously crafted file may cause unexpected process termination or disclose process memory

  An out-of-bounds read issue was addressed with improved input validation.

  CVE-2026-84532

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

  The issue was addressed with improved memory handling.

  CVE-2026-84632

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

  An integer overflow was addressed with improved input validation.

  CVE-2026-84620

• SceneKit

  Processing a maliciously crafted 3D model may lead to memory corruption

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84546 CVE-2026-84611

• SceneKit

  Processing a maliciously crafted 3D scene may lead to unexpected process termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84526

• Security

  Processing maliciously crafted NTLM input may lead to unexpected app termination

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-84531

• SpringBoard

  An app may be able to cause a denial-of-service

  This issue was addressed with additional entitlement checks.

  CVE-2026-86892

• WebKit

  Processing maliciously crafted web content may lead to an unexpected process termination

  A logic issue was addressed with improved state management.

  CVE-2026-84635

• WebKit Canvas

  Processing maliciously crafted web content may lead to an unexpected Safari crash

  A use-after-free issue was addressed with improved memory management.

  CVE-2026-64718

• Wi-Fi

  An attacker in physical proximity may be able to cause a denial-of-service

  An out-of-bounds write issue was addressed with improved bounds checking.

  CVE-2026-86953

• Wi-Fi

  An attacker in wireless proximity may be able to cause unexpected system termination

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-86957

• Accessibility

  An app may be able to identify what other apps a user has installed

  A privacy issue was addressed with improved handling of user preferences.

  CVE-2026-64761

• App Store

  A local app may be able to read a persistent account identifier

  A permissions issue was addressed with additional restrictions.

  CVE-2026-86888

• AuthKit

  A local app may be able to read a persistent account identifier

  A permissions issue was addressed with additional restrictions.

  CVE-2026-84583

• Bluetooth

  An app may gain unauthorized access to Bluetooth

  An authorization issue was addressed with improved state management.

  CVE-2026-84560

• CloudKit

  A local app may be able to read a persistent account identifier

  An information disclosure issue was addressed with improved state management.

  CVE-2026-86895

• CloudKit

  An app may be able to read device name

  A permissions issue was addressed with additional restrictions.

  CVE-2026-86893

• copyfile

  An app may be able to modify protected parts of the file system

  This issue was addressed with improved handling of symlinks.

  CVE-2026-86966

• Core Bluetooth

  Processing a maliciously crafted Bluetooth packet may result in disclosure of process memory

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-112608

• CoreText

  Processing a maliciously crafted font may result in the disclosure of process memory

  An out-of-bounds read was addressed with improved bounds checking.

  CVE-2026-84596

• CoreUI

  Processing a maliciously crafted asset catalog may result in disclosure of process memory

  The issue was addressed with improved memory handling.

  CVE-2026-43738

• DeviceCheck

  An app may be able to read persistent device identifiers

  An authorization issue was addressed with improved access control.

  CVE-2026-84612

• File Bookmark

  An app may be able to modify a file it only had permission to read

  A permissions issue was addressed with additional restrictions.

  CVE-2026-43785

• file_cmds

  Extracting a maliciously crafted archive may allow an attacker to write arbitrary files

  A path handling issue was addressed with improved validation.

  CVE-2026-84534

• FontParser

  Processing a maliciously crafted font may result in the disclosure of process memory

  An out-of-bounds read issue was addressed with improved input validation.

  CVE-2026-84597

• iCloud

  An app may be able to identify a user across reinstalls

  A privacy issue was addressed with improved handling of identifiers.

  CVE-2026-84606

• ImageIO

  Processing a maliciously crafted image may result in disclosure of process memory

  An uninitialized memory issue was addressed with improved memory initialization.

  CVE-2026-84564

• MobileBackup

  An app may be able to modify protected parts of the file system

  A path handling issue was addressed with improved validation.

  CVE-2026-65411

• NetworkExtension

  An app may be able to identify what other apps a user has installed

  An information disclosure issue was addressed with improved state management.

  CVE-2026-84626

• Photos Storage

  An app may be able to fingerprint the user

  This issue was addressed with additional entitlement checks.

  CVE-2026-84629

• Power Management

  An app may be able to fingerprint the device

  An authorization issue was addressed with improved state management.

  CVE-2026-84623

• Safari

  A malicious website may be able to determine what apps a user has installed

  This issue was addressed through improved state management.

  CVE-2026-84518

• Sandbox Profiles

  An app may be able to fingerprint the user

  A permissions issue was addressed with additional sandbox restrictions.

  CVE-2026-84625

• SceneKit

  Processing a maliciously crafted file may result in disclosure of process memory

  An integer overflow was addressed with improved input validation.

  CVE-2026-84487

• Security

  An attacker with a compromised intermediate certificate authority may be able to issue certificates with arbitrary extended key usages

  A certificate validation issue was addressed with improved certificate validation.

  CVE-2026-86881

• Shortcuts

  A malicious shortcut may be able to send messages without user confirmation

  An authorization issue was addressed with improved state management.

  CVE-2026-84600

• Siri

  A local attacker may be able to overwrite restricted files

  A permissions issue was addressed with improved validation.

  CVE-2026-86921

• Software Update

  An app may be able to modify protected system files

  A permissions issue was addressed with improved path validation.

  CVE-2026-84609

• Storage

  An app may be able to modify protected parts of the file system

  A permissions issue was addressed with additional restrictions.

  CVE-2026-65348

• TCC

  An app may be able to modify protected system files

  A path traversal issue was addressed with improved input validation.

  CVE-2026-86886

• Telephony

  An app may be able to initiate calls or send messages

  An authorization issue was addressed with improved network restrictions.

  CVE-2026-86977

iOS 27 Security Release History

iOS 27 in context: the security releases Apple has published for iOS 27, newest first, with the number of fixes each carried.

The Same Fixes Elsewhere

Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:

Frequently Asked Questions