CVE-2025-43186: 
macOS vulnerability analysis and mitigation

CVE-2025-43186 is a memory handling vulnerability discovered in Apple's operating systems that was disclosed and patched on July 29, 2025. The vulnerability affects multiple Apple platforms including watchOS 11.6, iOS 18.6, iPadOS 18.6, tvOS 18.6, macOS Sequoia 15.6, macOS Sonoma 14.7.7, visionOS 2.6, and macOS Ventura 13.7.7. The issue was discovered by Hossein Lotfi of Trend Micro Zero Day Initiative (Apple Support).

The vulnerability is related to improper memory handling when parsing files, which can lead to unexpected application termination. The issue has been assigned a CVSS v3.1 base score of 9.8 (CRITICAL) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. It is categorized under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) (NVD).

When exploited, this vulnerability can cause unexpected application termination when parsing files. The high CVSS score indicates potential severe impacts on system confidentiality, integrity, and availability (NVD).

Apple has addressed this vulnerability by improving memory handling in the affected operating systems. The fix is available in the following updates: watchOS 11.6, iOS 18.6, iPadOS 18.6, tvOS 18.6, macOS Sequoia 15.6, macOS Sonoma 14.7.7, visionOS 2.6, and macOS Ventura 13.7.7. Users are advised to update their devices to these versions (Apple Support).