CVE-2025-43207 is a vulnerability identified in Apple macOS that allows an application to access sensitive user data due to inadequate entitlement enforcement. Entitlements in macOS define the permissions granted to apps, controlling access to system resources and user data. This vulnerability arises when an app can bypass or exploit entitlement checks, gaining unauthorized access to data that should be protected. The issue was addressed by Apple in macOS Tahoe 26 through improved entitlement validation mechanisms, ensuring that only properly authorized apps can access sensitive information. The CVSS v3.1 base score is 5.5 (medium), reflecting that the attack vector is local (AV:L), with low attack complexity (AC:L), no privileges required (PR:N), but user interaction is necessary (UI:R). The scope is unchanged (S:U), and the impact is high on confidentiality (C:H) but none on integrity or availability (I:N/A:N). This means the vulnerability can lead to significant data exposure but does not allow modification or disruption of system operations. No known exploits have been reported in the wild, but the vulnerability represents a notable risk for privacy and data security on affected macOS systems. The underlying weakness corresponds to CWE-284 (Improper Access Control), indicating a failure to properly restrict access to resources. Organizations relying on macOS should apply the update to macOS Tahoe 26 promptly to remediate this issue.

The primary impact of CVE-2025-43207 is the unauthorized disclosure of sensitive user data on affected macOS systems. This can lead to privacy violations, potential identity theft, or leakage of confidential information, depending on the nature of the data accessed. Since the vulnerability does not affect system integrity or availability, it does not enable attackers to alter or disrupt system operations but compromises confidentiality. The requirement for local access and user interaction limits remote exploitation but does not eliminate risk, especially in environments where users may be tricked into running malicious apps or where endpoint security is lax. Organizations with macOS endpoints, particularly those handling sensitive or regulated data, face increased risk of data breaches if unpatched. The vulnerability could be leveraged by malicious insiders or malware that gains user-level execution to harvest sensitive information. Overall, the impact is significant for data privacy and compliance but less so for operational continuity.

To mitigate CVE-2025-43207, organizations should immediately update all macOS devices to macOS Tahoe 26 or later, where the entitlement enforcement improvements have been implemented. Beyond patching, organizations should enforce strict application control policies, such as using Apple’s notarization and Gatekeeper features to restrict installation of untrusted apps. Employ endpoint detection and response (EDR) tools to monitor for unusual app behaviors indicative of unauthorized data access attempts. Educate users to avoid installing or running unverified applications, as user interaction is required for exploitation. Implement least privilege principles to limit user permissions and reduce the attack surface. Regularly audit installed applications and their entitlements to ensure compliance with security policies. For high-security environments, consider additional data encryption and access monitoring to detect potential data exfiltration. Finally, maintain up-to-date asset inventories to quickly identify and remediate vulnerable systems.