CVE-2025-43325 is a vulnerability identified in Apple macOS, specifically addressed by Apple through additional sandbox restrictions in the macOS Tahoe 26 update. The vulnerability involves an access control issue where a malicious or compromised application may bypass existing sandbox constraints to gain unauthorized access to sensitive user data. Although the exact affected versions are unspecified, the vulnerability is significant because it potentially allows an app to access data that should be protected by the operating system's security boundaries. The sandbox mechanism in macOS is designed to isolate applications and restrict their access to system resources and user data. A failure or weakness in this mechanism can lead to data leakage or unauthorized data access. The vulnerability was reserved in April 2025 and published in September 2025, with no known exploits in the wild at the time of publication. No CVSS score has been assigned yet, and no detailed technical exploit information is provided. However, the nature of the vulnerability suggests a privilege escalation or sandbox escape scenario that could compromise user confidentiality.

For European organizations, this vulnerability poses a risk to the confidentiality of sensitive user and organizational data stored or processed on macOS devices. Organizations relying on macOS for endpoint computing, especially those handling personal data subject to GDPR, face potential data breaches if malicious applications exploit this vulnerability. The unauthorized access to sensitive data could lead to exposure of intellectual property, personal identifiable information (PII), or other confidential information. This could result in regulatory penalties, reputational damage, and operational disruptions. Since macOS is widely used in sectors such as creative industries, finance, and technology within Europe, the impact could be significant if exploited. Additionally, the lack of known exploits currently provides a window for proactive patching and mitigation before widespread attacks occur.

European organizations should prioritize updating all macOS devices to macOS Tahoe 26 or later, where the vulnerability is fixed. Given the unspecified affected versions, organizations should audit their macOS fleet to identify devices running older versions and plan immediate upgrades. Implement strict application control policies to limit the installation and execution of untrusted or unsigned applications, reducing the risk of malicious apps exploiting the vulnerability. Employ endpoint detection and response (EDR) solutions capable of monitoring for unusual application behaviors indicative of sandbox escape attempts. Additionally, enforce the principle of least privilege for user accounts and applications to minimize potential damage. Regularly review and update security policies related to macOS usage, and educate users about the risks of installing unverified software. Finally, maintain backups and incident response plans to quickly address any potential data breaches resulting from exploitation.