CVE-2025-43250 is a vulnerability in Apple macOS related to improper path validation, specifically a path traversal or directory traversal issue (CWE-22). This flaw allows an application running within the macOS sandbox to escape its restricted environment by exploiting weaknesses in how file paths are handled and validated. The sandbox is a critical security mechanism designed to isolate applications and limit their access to system resources and user data. By breaking out of the sandbox, a malicious or compromised app could gain elevated privileges or access to files and resources outside its intended scope, potentially leading to unauthorized modification of system files or other applications' data. The vulnerability affects macOS versions prior to Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7, where Apple has implemented improved path validation to mitigate this issue. The CVSS v3.1 base score is 4.0, reflecting a medium severity level, with an attack vector limited to local access, no privileges required, and no user interaction needed. The scope remains unchanged, and the impact is limited to integrity, meaning the attacker could alter data but not necessarily access confidential information or disrupt availability. No public exploits or active exploitation campaigns have been reported, but the potential for sandbox escape makes this a significant concern for environments relying on macOS sandboxing for security containment.

The primary impact of CVE-2025-43250 is the potential for an application to escape the macOS sandbox, undermining the integrity of the system and applications. This could allow a malicious app or attacker with local access to modify files or system components outside the sandbox constraints, potentially leading to unauthorized changes, persistence mechanisms, or lateral movement within the system. Although confidentiality and availability impacts are not directly indicated, integrity compromise can facilitate further attacks that may escalate privileges or exfiltrate data indirectly. Organizations relying on macOS sandboxing for security isolation, such as software developers, enterprises with macOS endpoints, and users running third-party applications, are at risk. The medium severity and local attack vector mean that exploitation requires local access, limiting remote attack scenarios but still posing a risk in environments where attackers can gain local footholds, such as through social engineering, phishing, or insider threats.

To mitigate CVE-2025-43250, organizations should promptly update affected macOS systems to versions Sequoia 15.6, Sonoma 14.7.7, or Ventura 13.7.7 or later, where the vulnerability is patched. Beyond patching, organizations should implement strict application whitelisting and code signing policies to reduce the risk of untrusted or malicious applications running locally. Employ endpoint detection and response (EDR) solutions capable of monitoring for unusual sandbox escape behaviors or unauthorized file system access. Limit local user privileges to the minimum necessary to reduce the attack surface. Regularly audit installed applications and sandbox configurations to ensure compliance with security policies. For environments with sensitive data, consider additional sandboxing or containerization layers and monitor logs for suspicious path traversal or file access attempts. Educate users about the risks of installing untrusted software and maintain robust physical and logical access controls to prevent unauthorized local access.