CVE-2025-43439 is a privacy vulnerability identified in Apple visionOS, as well as iOS and iPadOS versions, where an application with limited privileges (local access with privileges) can fingerprint the user by accessing sensitive data that should not be exposed. Fingerprinting here refers to the ability to uniquely identify or track a user based on device or usage characteristics, which can compromise user privacy. The vulnerability is classified under CWE-359 (Exposure of Sensitive Information Through an Information Leak). The CVSS v3.1 base score is 5.5 (medium), with vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N, indicating local attack vector, low complexity, requiring privileges, no user interaction, unchanged scope, high confidentiality impact, and no impact on integrity or availability. Apple addressed this issue by removing the sensitive data that enabled fingerprinting in visionOS 26.1, iOS 18.7.2, and iPadOS 18.7.2. No public exploits have been reported, and the vulnerability was reserved in April 2025 and published in November 2025. This vulnerability primarily threatens user privacy by enabling apps to track or profile users without consent.

For European organizations, the primary impact is on user privacy and compliance with data protection regulations such as the GDPR, which mandates strict controls on personal data processing and user consent. Unauthorized fingerprinting could lead to profiling or tracking without user consent, potentially resulting in regulatory penalties and reputational damage. Organizations deploying Apple visionOS devices in sensitive environments (e.g., healthcare, finance, government) may face increased risk of privacy breaches. Although the vulnerability does not affect system integrity or availability, the confidentiality breach could undermine trust in Apple devices and applications. The absence of known exploits reduces immediate risk, but the potential for privacy violations remains significant until patched.

European organizations should ensure all Apple visionOS devices are updated to version 26.1 or later, and similarly update iOS and iPadOS devices to 18.7.2 or later to eliminate the vulnerability. Restrict installation of untrusted or unnecessary apps on visionOS devices to minimize exposure to potentially malicious apps attempting fingerprinting. Employ Mobile Device Management (MDM) solutions to enforce update policies and control app permissions rigorously. Conduct privacy impact assessments for applications deployed on visionOS to detect and prevent fingerprinting behaviors. Monitor device logs and network traffic for unusual patterns that may indicate fingerprinting attempts. Educate users about the importance of installing updates promptly and the risks of installing apps from unverified sources. Coordinate with Apple support channels for any additional guidance or patches.