CVE-2025-43286 is a sandbox escape vulnerability in Apple macOS identified as a permissions issue that allows an application to break out of its restricted execution environment. The sandbox is a critical security mechanism designed to isolate applications and limit their access to system resources, thereby preventing malicious or compromised apps from affecting the broader system. This vulnerability arises from insufficient enforcement of sandbox restrictions, enabling an app with low privileges to escalate its permissions and interact with system components beyond its intended scope. The issue affects macOS versions before Sonoma 14.8 and Sequoia 15.7, where Apple has implemented additional restrictions to address the flaw. The vulnerability is classified under CWE-862 (Missing Authorization), indicating that the system fails to properly verify permissions before granting access. The CVSS v3.1 base score is 7.8, with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, meaning the attack requires local access with low complexity and privileges, no user interaction, and results in high confidentiality, integrity, and availability impacts. Although no exploits have been observed in the wild, the potential for privilege escalation and full system compromise makes this a significant threat. The vulnerability is particularly concerning for environments where untrusted or third-party applications are installed, as these could leverage the flaw to bypass sandbox protections and execute malicious actions at the system level.

The vulnerability allows an attacker with local access and low privileges to escape the macOS sandbox, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, modification or deletion of critical system files, and disruption of system availability. The breach of sandbox isolation undermines the fundamental security model of macOS, increasing the risk of persistent malware infections, data exfiltration, and lateral movement within networks. Organizations relying on macOS for endpoint security, development, or operational tasks face increased risk of targeted attacks, especially in environments with multiple users or shared systems. The high impact on confidentiality, integrity, and availability means that sensitive corporate data, intellectual property, and user privacy could be severely affected. Additionally, the ease of exploitation without user interaction raises the likelihood of automated or stealthy attacks once local access is obtained.

To mitigate this vulnerability, organizations should promptly apply the security updates provided in macOS Sonoma 14.8 and macOS Sequoia 15.7 or later. Until patches are deployed, restrict local user access to trusted personnel only and enforce strict application installation policies to minimize exposure to untrusted apps. Employ endpoint protection solutions capable of monitoring and restricting suspicious privilege escalation behaviors. Implement application whitelisting and sandboxing policies to limit the execution of unknown or unverified applications. Regularly audit system logs for unusual activity indicative of sandbox escape attempts. For environments with high security requirements, consider deploying additional runtime protections such as macOS System Integrity Protection (SIP) and Mandatory Access Controls (MAC). Educate users about the risks of installing unauthorized software and maintain robust access controls to reduce the attack surface. Finally, integrate vulnerability management processes to ensure timely patching and continuous monitoring of macOS endpoints.