CVE-2025-43332 is a sandbox escape vulnerability in Apple macOS identified as a file quarantine bypass issue. The macOS sandbox is a security mechanism designed to isolate applications and restrict their access to system resources and user data. This vulnerability allows a malicious or compromised app to bypass the file quarantine mechanism, which is intended to prevent untrusted files from executing without proper checks. By exploiting this bypass, an app may break out of its sandbox environment, thereby gaining broader access to system resources than intended. The vulnerability was addressed by Apple through additional checks in the file quarantine process, implemented in macOS Sequoia 15.7, Sonoma 14.8, and Tahoe 26. The CVSS v3.1 base score is 5.2, indicating a medium severity level. The vector indicates local attack vector (AV:L), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), with a scope change (S:C), and limited confidentiality and integrity impacts (C:L/I:L), but no availability impact (A:N). This means an attacker with local access and low privileges can exploit the vulnerability without user interaction to gain elevated access beyond the sandbox, potentially accessing or modifying sensitive data or system components. The vulnerability is categorized under CWE-284 (Improper Access Control), highlighting that the issue arises from insufficient enforcement of access restrictions. No known exploits are currently reported in the wild, but the potential for sandbox escape makes this a significant concern for macOS users and organizations relying on macOS security boundaries.

The primary impact of CVE-2025-43332 is the potential for an app to escape the macOS sandbox, which is a critical security boundary designed to isolate applications and limit their access to system resources and user data. Successful exploitation could allow a malicious app to access or modify data outside its sandbox, leading to confidentiality and integrity breaches. This could facilitate further attacks such as privilege escalation, data exfiltration, or persistence mechanisms that are harder to detect. Although the vulnerability does not directly impact system availability, the compromise of sandbox integrity undermines the overall security posture of affected macOS systems. Organizations that rely on macOS for sensitive operations, development, or secure environments may face increased risk of targeted attacks or insider threats exploiting this vulnerability. The requirement for local access and low privileges means that attackers need some foothold on the system, but once achieved, the sandbox escape can significantly elevate their capabilities. The lack of user interaction needed simplifies exploitation scenarios, increasing the risk if systems are not patched promptly.

To mitigate CVE-2025-43332, organizations and users should promptly apply the security updates released by Apple in macOS Sequoia 15.7, Sonoma 14.8, and Tahoe 26, which contain the necessary fixes. Beyond patching, organizations should enforce strict application control policies to limit the installation and execution of untrusted or unsigned applications, reducing the risk of malicious apps gaining local access. Employ endpoint detection and response (EDR) solutions capable of monitoring for unusual sandbox escape behaviors or unauthorized access attempts. Regularly audit and restrict user privileges to the minimum necessary to reduce the attack surface for local privilege exploitation. Implement network segmentation and data access controls to limit the impact of any potential sandbox escape. Additionally, educate users about the risks of running untrusted software and maintain robust backup and recovery procedures to mitigate potential damage from exploitation. Monitoring Apple security advisories for any updates or related vulnerabilities is also recommended.