CVE-2025-24203 is a vulnerability identified in Apple iPadOS and several macOS versions that allows an application to modify protected parts of the file system. The issue arises from insufficient validation checks within the operating system that previously allowed apps with limited privileges to alter system files that should be protected. Exploitation requires the attacker to have local access with limited privileges (PR:L) and user interaction (UI:R), such as convincing a user to install or run a malicious app. The vulnerability does not affect confidentiality or availability but impacts integrity by enabling unauthorized modification of system files, which could lead to persistence of malicious code or bypass of security controls. Apple addressed this vulnerability by implementing improved validation checks in iPadOS 17.7.6, macOS Ventura 13.7.5, macOS Sequoia 15.4, and macOS Sonoma 14.7.5. The CVSS v3.1 base score is 5.0 (medium severity), reflecting the limited attack vector (local), low complexity, and requirement for user interaction. No known exploits have been reported in the wild, indicating the threat is currently theoretical but should be mitigated proactively. The vulnerability affects unspecified versions prior to the patched releases, so organizations should verify their device OS versions and update accordingly. This flaw could be leveraged by attackers to maintain persistence or escalate privileges by modifying critical system files, potentially undermining device security and trustworthiness.

For European organizations, the primary impact of CVE-2025-24203 lies in the potential compromise of device integrity on Apple iPads and Macs. Unauthorized modification of protected file system areas could allow attackers to implant persistent malware, alter security configurations, or bypass security mechanisms. This could lead to longer-term compromise of sensitive data or disruption of business operations if devices are used for critical tasks. Although confidentiality and availability are not directly affected, the integrity breach could facilitate further attacks or data exfiltration. Organizations relying heavily on Apple devices for mobile workforce, secure communications, or sensitive data processing are at risk. The requirement for local access and user interaction limits remote exploitation but insider threats or social engineering attacks could leverage this vulnerability. Failure to patch could expose organizations to targeted attacks aiming to maintain footholds on devices or evade detection. Given the widespread use of Apple devices in European enterprises and government sectors, the vulnerability poses a moderate risk that should be addressed promptly to maintain device security and compliance with data protection regulations.

European organizations should implement the following specific mitigation measures: 1) Immediately identify and inventory all Apple devices running iPadOS or macOS to determine exposure to vulnerable versions. 2) Deploy the security updates released by Apple: iPadOS 17.7.6, macOS Ventura 13.7.5, macOS Sequoia 15.4, and macOS Sonoma 14.7.5, ensuring all devices are patched promptly. 3) Enforce strict application installation policies, restricting installation to trusted sources such as the Apple App Store and using Mobile Device Management (MDM) solutions to control app permissions. 4) Educate users on the risks of installing untrusted applications and the importance of avoiding social engineering attempts that could trigger user interaction exploitation. 5) Monitor device integrity and file system changes using endpoint detection and response (EDR) tools capable of detecting unauthorized modifications to protected system areas. 6) Implement least privilege principles to limit user and app permissions, reducing the impact of potential exploitation. 7) Regularly audit device compliance and update policies to reflect evolving threat landscapes. These targeted actions go beyond generic patching by emphasizing proactive device management, user awareness, and monitoring to reduce exploitation likelihood and impact.