CVE-2025-43471 is a vulnerability identified in Apple macOS that permits an application with limited privileges (low-level local access) to access sensitive user data improperly. The root cause is insufficient enforcement of access control checks, categorized under CWE-497 (Exposure of Sensitive Information to an Unauthorized Actor). This flaw does not require user interaction or elevated privileges, making it easier for malicious local apps or attackers with limited access to exploit. The vulnerability was addressed by Apple in macOS Tahoe 26.1 through enhanced verification mechanisms that prevent unauthorized data access. The CVSS v3.1 score of 5.5 reflects a medium severity, with a vector indicating local attack vector (AV:L), low attack complexity (AC:L), low privileges required (PR:L), no user interaction (UI:N), unchanged scope (S:U), high confidentiality impact (C:H), and no impact on integrity or availability (I:N/A:N). No public exploits have been reported yet, but the vulnerability poses a risk to user privacy and data confidentiality on affected systems.

The primary impact of CVE-2025-43471 is unauthorized disclosure of sensitive user data on affected macOS systems. This can lead to privacy violations, leakage of personal or corporate information, and potential secondary attacks leveraging exposed data. Since the vulnerability requires only low privileges and no user interaction, malicious local apps or attackers with limited access could exploit it to escalate their data access capabilities. While it does not affect system integrity or availability, the confidentiality breach can be significant, especially in environments handling sensitive or regulated data. Organizations relying on macOS devices for critical operations or handling sensitive user information are at risk of data exposure, which could lead to compliance violations, reputational damage, and potential financial loss.

To mitigate CVE-2025-43471, organizations and users should promptly update all affected macOS systems to version Tahoe 26.1 or later, where the vulnerability has been fixed. Beyond patching, implement strict application whitelisting and endpoint protection to prevent unauthorized or untrusted apps from running locally. Employ least privilege principles to limit app permissions and user accounts to reduce the attack surface. Monitor local system activities for unusual access patterns to sensitive data. For environments with high security requirements, consider additional data encryption at rest and in use, and use macOS security features such as System Integrity Protection (SIP) and privacy controls to restrict app data access. Regularly audit installed applications and their permissions to detect potentially malicious or vulnerable software.