CVE-2025-46289 is a logic flaw in Apple macOS's file handling mechanisms that could allow a malicious application to access protected user data without proper authorization. The vulnerability stems from improper enforcement of access controls, categorized under CWE-285 (Improper Authorization). It affects multiple macOS versions prior to the patched releases: Sequoia 15.7.3, Sonoma 14.8.3, and Tahoe 26.2. The flaw does not require elevated privileges (PR:N) but does require user interaction (UI:R), such as running or installing a malicious app. The attack vector is local (AV:L), meaning the attacker must have local access to the system. The CVSS v3.1 base score is 5.5, reflecting medium severity, with a high impact on confidentiality (C:H) but no impact on integrity (I:N) or availability (A:N). The vulnerability allows unauthorized reading of sensitive user data, potentially exposing personal or confidential information. No known exploits have been reported in the wild, but the risk remains significant given the widespread use of macOS in personal and enterprise environments. Apple addressed the issue by improving file handling logic to enforce stricter access controls, thereby preventing unauthorized data access by unprivileged apps.

The primary impact of CVE-2025-46289 is the unauthorized disclosure of protected user data, which can lead to privacy violations, data leakage, and potential exposure of sensitive information such as credentials, personal files, or corporate data. Although the vulnerability does not affect system integrity or availability, the confidentiality breach can undermine user trust and lead to compliance violations, especially in regulated industries. Organizations relying on macOS devices for sensitive operations, including government agencies, financial institutions, and enterprises, face increased risk of data exposure if unpatched. The requirement for local access and user interaction limits remote exploitation but does not eliminate risk, particularly in environments where users may inadvertently run malicious applications or where insider threats exist. The absence of known exploits reduces immediate threat but does not preclude future attacks leveraging this vulnerability.

To mitigate CVE-2025-46289, organizations and users should promptly apply the security updates released by Apple for macOS Sequoia 15.7.3, Sonoma 14.8.3, and Tahoe 26.2 or later. Beyond patching, implement strict application control policies to restrict installation and execution of untrusted or unsigned applications. Employ endpoint protection solutions capable of detecting suspicious local activities and monitor for unusual file access patterns. Educate users about the risks of running unknown applications and enforce the principle of least privilege to minimize the impact of potential local exploits. Regularly audit macOS systems for compliance with security baselines and ensure that file permissions and access controls are correctly configured. For high-security environments, consider additional data encryption and user data access monitoring to detect unauthorized access attempts.