CVE-2025-43387 is a vulnerability in Apple macOS identified as a permissions issue that allows a malicious application to escalate privileges to root. The root cause is an incorrect authorization flaw (CWE-863) where certain operations lack adequate restrictions, enabling an attacker with limited privileges to gain full system control. This vulnerability affects macOS versions before Sequoia 15.7.2 and Tahoe 26.1, where Apple has implemented additional restrictions to address the issue. The CVSS v3.1 base score is 7.8, reflecting high severity due to the combination of local attack vector (AV:L), low attack complexity (AC:L), requiring privileges (PR:L), no user interaction (UI:N), and full impact on confidentiality, integrity, and availability (C:H/I:H/A:H). Exploitation requires an attacker to have some level of local privileges but no user interaction, making it a serious threat in scenarios where an attacker has already compromised a user account or has insider access. No known exploits have been reported in the wild yet, but the vulnerability's nature makes it a prime candidate for post-compromise privilege escalation. The vulnerability affects core macOS components responsible for enforcing permissions and authorization policies, and successful exploitation could allow attackers to execute arbitrary code with root privileges, leading to complete system compromise. The fix involves enhanced authorization checks and restrictions introduced in the latest macOS updates. Organizations running affected macOS versions should apply these updates promptly to mitigate risk.

The impact of CVE-2025-43387 is significant for organizations using macOS systems. Successful exploitation grants attackers root privileges, enabling full control over the affected system. This can lead to unauthorized access to sensitive data, installation of persistent malware, disruption of system availability, and potential lateral movement within networks. Since exploitation requires local access with some privileges but no user interaction, attackers who have compromised user accounts or insiders can escalate their privileges to root, bypassing security controls. This elevates the risk in environments where macOS devices are used for critical operations, including enterprise networks, government agencies, and research institutions. The ability to gain root access undermines system integrity and confidentiality, potentially exposing intellectual property, personal data, and critical infrastructure controls. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, as attackers may develop exploits rapidly once details are public. Organizations failing to patch may face targeted attacks, especially in sectors with high-value data or strategic importance.

1. Immediately apply the official patches released by Apple in macOS Sequoia 15.7.2 and Tahoe 26.1 or later versions to remediate the vulnerability. 2. Restrict local user privileges by enforcing the principle of least privilege, limiting the ability to install or execute untrusted applications. 3. Implement application whitelisting to prevent unauthorized or malicious apps from running. 4. Monitor system logs and audit privilege escalation attempts to detect suspicious activity early. 5. Employ endpoint detection and response (EDR) solutions tailored for macOS to identify anomalous behavior indicative of exploitation. 6. Educate users about the risks of installing untrusted software and enforce strict policies on software installation. 7. Regularly review and update security configurations related to authorization and permissions on macOS devices. 8. For high-security environments, consider network segmentation to limit the impact of compromised macOS endpoints. 9. Maintain up-to-date backups to recover quickly from potential compromises. 10. Stay informed about any emerging exploit developments related to this CVE to adjust defenses accordingly.