CVE-2025-43195: 
macOS vulnerability analysis and mitigation

CVE-2025-43195 is a security vulnerability discovered in Apple's macOS operating systems that affects the handling of environment variables in CoreServices. The vulnerability was disclosed on July 29, 2025, and affects multiple versions of macOS including Sequoia, Sonoma, and Ventura. The issue allows a malicious application to potentially access sensitive user data (Apple Support, NVD).

The vulnerability stems from improper input validation (CWE-20) in the handling of environment variables within the CoreServices component. The issue received a CVSS 3.1 Base Score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, indicating local access is required and user interaction is needed, but the potential for high confidentiality impact exists (NVD).

The vulnerability allows a malicious application to access sensitive user data through improper handling of environment variables. This could potentially lead to unauthorized access to private user information (Apple Support).

Apple has addressed this vulnerability by implementing improved validation in the following macOS versions: macOS Sequoia 15.6, macOS Sonoma 14.7.7, and macOS Ventura 13.7.7. Users are advised to update their systems to these versions to mitigate the risk (Apple Support, Apple Support, Apple Support).

The vulnerability was discovered and reported by security researchers 风沐云烟 (@binary_fmyy) and Minghao Lin (@Y1nKoc), demonstrating ongoing security research efforts in the macOS ecosystem (Apple Support).