CVE-2025-43259 is a vulnerability identified in Apple macOS that allows an attacker with physical access to a locked device to view sensitive user information. The root cause is insufficient redaction of sensitive data displayed or accessible on the lock screen or through other system interfaces when the device is locked. This vulnerability does not require any user interaction or prior privileges, but physical possession of the device is mandatory. The issue was addressed by Apple through improved redaction techniques in macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7. The vulnerability is classified under CWE-359, which relates to exposure of sensitive information due to improper handling or redaction. The CVSS v3.1 base score is 4.6, indicating medium severity, with the vector AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N, meaning the attack vector requires physical access, low attack complexity, no privileges or user interaction, unchanged scope, and high confidentiality impact without affecting integrity or availability. No known exploits are currently reported in the wild. This vulnerability primarily threatens the confidentiality of user data on locked macOS devices, potentially exposing sensitive information to unauthorized individuals who gain physical access.

The primary impact of CVE-2025-43259 is the compromise of confidentiality on affected macOS devices. An attacker with physical access to a locked device can bypass redaction controls and view sensitive user information, which may include personal data, credentials, or other confidential content displayed or accessible on the lock screen or through system interfaces. This exposure can lead to privacy violations, identity theft, or targeted attacks leveraging the disclosed information. Since the vulnerability does not affect integrity or availability, system operations remain intact, but the breach of confidentiality can have significant consequences for individuals and organizations. Environments with shared or publicly accessible devices, such as corporate offices, educational institutions, or public kiosks, are particularly vulnerable. The lack of requirement for user interaction or privileges lowers the barrier for exploitation once physical access is obtained. Although no exploits are known in the wild, the risk remains notable until all affected systems are updated. Organizations relying heavily on macOS devices for sensitive operations or data storage face increased risk of data leakage and should prioritize remediation.

To mitigate CVE-2025-43259, organizations and users should promptly apply the security updates provided by Apple in macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7 or later versions. Beyond patching, physical security controls must be strengthened to prevent unauthorized access to devices, including the use of secure storage, locked rooms, or cable locks. Implementing full disk encryption with strong passphrases can reduce the risk of data exposure if devices are stolen or accessed physically. Organizations should also review and restrict the information displayed on lock screens to minimize sensitive data exposure. Employing endpoint management solutions to enforce update policies and monitor device compliance can ensure timely patch deployment. User training on the importance of physical device security and awareness of this vulnerability can further reduce risk. For high-security environments, consider additional authentication mechanisms such as biometric locks or multi-factor authentication to complement device locking. Regular audits of physical access controls and device inventory help detect and respond to potential exposures quickly.