CVE-2025-43281 is a local privilege escalation vulnerability identified in Apple macOS, specifically addressed in the macOS Sequoia 15.6 update. The root cause lies in insufficient authentication controls, classified under CWE-287 (Improper Authentication). A local attacker with limited privileges can exploit this flaw to gain elevated privileges, potentially achieving administrative or root-level access. The vulnerability does not require user interaction and has a low attack complexity, making exploitation feasible in environments where an attacker has local access. The CVSS v3.1 base score is 7.8, reflecting high severity with impacts on confidentiality, integrity, and availability. Although no exploits are currently known in the wild, the vulnerability poses a significant risk due to the potential for full system compromise. The fix involves improved authentication mechanisms implemented in macOS Sequoia 15.6, which should be applied promptly to mitigate the risk. This vulnerability is particularly critical in multi-user systems or scenarios where local access can be obtained by untrusted users.

The vulnerability allows an attacker with local access to escalate privileges, potentially gaining full administrative control over affected macOS systems. This can lead to unauthorized access to sensitive data, modification or deletion of critical system files, installation of persistent malware, and disruption of system availability. Organizations relying on macOS for critical operations, especially in enterprise, government, and research environments, face risks of data breaches, operational downtime, and compromise of intellectual property. The ease of exploitation without user interaction increases the threat level, particularly in environments where physical or remote local access is possible. The absence of known exploits in the wild currently limits immediate widespread impact, but the vulnerability remains a significant risk until patched.

1. Immediately update all macOS systems to macOS Sequoia 15.6 or later, where the vulnerability is fixed. 2. Restrict local access to macOS systems by enforcing strict physical security and limiting user accounts with local login privileges. 3. Implement endpoint detection and response (EDR) solutions capable of monitoring for unusual privilege escalation behaviors. 4. Regularly audit user accounts and permissions to ensure the principle of least privilege is enforced. 5. Employ multi-factor authentication for local logins where possible to add an additional layer of security. 6. Educate users and administrators about the risks of local access and the importance of timely patching. 7. Monitor security advisories from Apple for any updates or additional mitigations related to this vulnerability.