CVE-2025-43245: 
macOS vulnerability analysis and mitigation

CVE-2025-43245 is a downgrade issue in Apple's macOS operating system that was discovered and disclosed on July 29, 2025. The vulnerability affects multiple versions of macOS including Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7. The issue was identified by security researcher Mickey Jin (@patch1t) and relates to code-signing restrictions in the AppleMobileFileIntegrity component (Apple Support, NVD).

The vulnerability is classified as a downgrade issue that was addressed with additional code-signing restrictions. According to the CVSS 3.1 scoring, it received a Critical severity rating with a Base Score of 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H). The vulnerability is associated with CWE-290 (Authentication Bypass by Spoofing) (NVD).

The vulnerability could allow a malicious app to access protected user data, potentially compromising sensitive information stored on affected systems. The high CVSS score indicates severe potential consequences if exploited (Apple Support, NVD).

While specific exploit details have not been publicly disclosed, the CVSS vector string indicates that the vulnerability requires no special privileges or user interaction to exploit, and can be accessed from the network, making it potentially attractive to attackers (NVD).

Apple has addressed this vulnerability by implementing additional code-signing restrictions in the security updates released for 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 protect against potential exploitation (Apple Support).