CVE-2025-43267 is a vulnerability identified in Apple's macOS operating system, specifically addressed in the macOS Sequoia 15.6 update. The vulnerability stems from an injection issue caused by insufficient input validation, which could allow a malicious application to access sensitive user data improperly. Injection vulnerabilities typically occur when untrusted input is processed in a way that allows an attacker to manipulate the execution flow or data access. In this case, the flaw enables an app to bypass normal security controls and access data that should be protected, potentially including personal files, credentials, or other confidential information stored on the system. The vulnerability was reserved in April 2025 and publicly disclosed in July 2025, with Apple providing a fix through improved validation mechanisms. No public exploits have been reported in the wild so far, and the affected macOS versions are unspecified, but the patch is available in the latest macOS Sequoia 15.6 release. The absence of a CVSS score means the exact severity has not been formally assessed, but the nature of the vulnerability suggests a significant risk to user privacy and system security.

For European organizations, this vulnerability poses a considerable risk, especially for those relying heavily on macOS devices for sensitive operations, including sectors like finance, healthcare, legal, and government. Unauthorized access to sensitive user data could lead to data breaches, loss of intellectual property, regulatory non-compliance (e.g., GDPR violations), and reputational damage. The injection flaw could be exploited by malicious insiders or external attackers who manage to distribute or run a compromised app within the organization’s environment. Given the widespread use of Apple devices in Europe, particularly in professional and creative industries, exploitation could result in significant confidentiality breaches. Additionally, the lack of known exploits in the wild currently reduces immediate risk, but the potential for future exploitation remains, especially if attackers reverse-engineer the patch or discover alternative attack vectors.

European organizations should prioritize updating all macOS devices to version Sequoia 15.6 or later to ensure the vulnerability is patched. Beyond patching, organizations should implement strict application whitelisting and code-signing enforcement to prevent unauthorized or malicious apps from executing. Employing endpoint detection and response (EDR) solutions that monitor for unusual access patterns to sensitive data can help detect exploitation attempts. User education on the risks of installing untrusted applications and maintaining strong device management policies (e.g., Mobile Device Management - MDM) will further reduce exposure. Regular audits of installed applications and permissions can identify potential risks early. For organizations with high-security requirements, consider isolating sensitive data access through containerization or sandboxing techniques to limit the impact of any compromised app. Finally, monitoring threat intelligence feeds for any emerging exploits related to this CVE will help maintain situational awareness.