CVE-2025-24220 is a permissions-related vulnerability in Apple’s iOS and iPadOS operating systems that allows an application to read a persistent device identifier without proper authorization. This issue stems from insufficient restrictions on access to device identifiers, which are intended to be protected to prevent unauthorized tracking or profiling of users. The vulnerability affects all versions prior to iOS 18.4 and iPadOS 18.4, including iPadOS 17.7.9, and was resolved by Apple through additional access control measures. The vulnerability is categorized under CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor). The CVSS v3.1 base score is 5.5 (medium), reflecting that the attack vector is local (AV:L), requires low attack complexity (AC:L), no privileges (PR:N), but does require user interaction (UI:R). The scope remains unchanged (S:U), and the impact is high on confidentiality (C:H) but none on integrity or availability (I:N/A:N). This means an attacker with a malicious app installed on the device and user interaction can extract a persistent device identifier, which could be used for tracking or correlating user activity across apps or services. No known exploits have been observed in the wild, but the vulnerability represents a privacy risk. The fix involves restricting access permissions to prevent unauthorized apps from reading this identifier.

The primary impact of CVE-2025-24220 is the unauthorized disclosure of a persistent device identifier, which compromises user privacy by enabling tracking or profiling across applications and services. This can lead to targeted advertising, user behavior analysis without consent, or even more sophisticated attacks if combined with other vulnerabilities or data leaks. For organizations, especially those handling sensitive user data or operating in regulated industries (e.g., finance, healthcare), this vulnerability could lead to compliance violations and reputational damage. While the vulnerability does not affect device integrity or availability, the exposure of persistent identifiers can undermine trust in mobile platforms and complicate efforts to enforce privacy policies. The requirement for local access and user interaction limits remote exploitation but does not eliminate risk, especially in environments where users may install untrusted apps. Enterprises with bring-your-own-device (BYOD) policies or mobile device management (MDM) solutions should be particularly vigilant. The absence of known exploits in the wild suggests limited active threat but does not preclude future exploitation attempts.

To mitigate CVE-2025-24220, organizations and users should promptly update affected devices to iOS 18.4, iPadOS 18.4, or iPadOS 17.7.9, where the vulnerability is fixed. Beyond patching, organizations should enforce strict app vetting policies, restricting installation of apps from untrusted sources to reduce the risk of malicious apps exploiting this vulnerability. Mobile Device Management (MDM) solutions can be configured to limit app permissions and monitor app behavior for suspicious access patterns. Educating users about the risks of installing unverified apps and the importance of user interaction consent can reduce exploitation likelihood. Developers should review their apps to ensure they do not rely on or expose persistent device identifiers unnecessarily. Additionally, organizations should audit logs and network traffic for unusual activity that might indicate attempts to extract device identifiers. Finally, privacy-focused configurations and settings should be enabled to minimize data exposure.