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Apple Releases iOS 26.4 with Critical Security Patches

Apple Releases iOS 26.4 with Critical Security Patches

First seen 25 Mar 2026, 17:48 UTC • •

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ThreatCluster AI
ThreatCluster •March 26, 2026 at 17:47 UTC
  • •iOS 26.4 addresses critical vulnerabilities affecting Siri, Keychain, and WebKit.
  • •Stolen Device Protection is now enabled by default for enhanced security.
  • •The update is available for iPhone 11 and later, and several iPad models.

Apple has launched iOS 26.4, addressing numerous security vulnerabilities across its operating system. The update, available for iPhone 11 and later models, as well as various iPad models, includes significant security enhancements and new features. Notable vulnerabilities fixed include a Siri flaw allowing unauthorized access to sensitive information, a Keychain vulnerability exposing stored credentials, and multiple WebKit issues that could facilitate cross-site scripting attacks. Additionally, kernel-level vulnerabilities were patched, which could have allowed apps to corrupt kernel memory or leak sensitive information. The update also introduces Stolen Device Protection enabled by default, enhancing security for users. Overall, the release aims to bolster user security while providing new functionalities in apps like Music and Podcasts.

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Timeline

2026-03-25
iOS 26.4 released with security patches and new features.

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