CVE-2025-43355: 
macOS vulnerability analysis and mitigation

A type confusion vulnerability (CVE-2025-43355) was discovered and disclosed on September 15, 2025. The vulnerability affects multiple Apple operating systems including tvOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, iOS 18.7, iPadOS 18.7, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26, and iPadOS 26. The issue was identified by security researcher Dawuge of Shuffle Team (Apple Security).

The vulnerability is classified as a type confusion issue in the MobileStorageMounter component that was addressed with improved memory handling. The CVSS v3.1 base score is 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The vulnerability is categorized under CWE-843: Access of Resource Using Incompatible Type (NVD).

When exploited, the vulnerability allows a malicious application to cause a denial-of-service condition on the affected system. This could potentially lead to system disruption and unexpected application termination (Apple Security, NVD).

Apple has released security updates to address this vulnerability across all affected operating systems. Users are advised to update to tvOS 26, macOS Sonoma 14.8, macOS Sequoia 15.7, iOS 18.7, iPadOS 18.7, visionOS 26, watchOS 26, macOS Tahoe 26, iOS 26, or iPadOS 26 depending on their device (Apple Security).