CVE-2024-54535 is a path traversal vulnerability categorized under CWE-22 that affects Apple’s iOS, iPadOS, macOS Sequoia, visionOS, and watchOS platforms. The flaw arises from improper path handling logic within the calendar and reminders data management components. Specifically, an attacker who already has access to calendar data on a vulnerable device can exploit this issue to read reminders data, which should be segregated and protected separately. This vulnerability does not require any user interaction or elevated privileges beyond access to calendar data, making it a local access vulnerability with limited attack surface. The issue was addressed by Apple through improved path handling logic in iOS 18.1, iPadOS 18.1, macOS Sequoia 15.1, visionOS 2.1, and watchOS 11.1. The CVSS v3.1 base score is 4.0, reflecting low complexity and limited impact confined to confidentiality. No known exploits have been reported in the wild, indicating the vulnerability is not currently actively exploited but remains a privacy concern. The vulnerability could allow unauthorized disclosure of reminders, which may contain sensitive personal or organizational information, potentially leading to privacy breaches or information leakage.

The primary impact of CVE-2024-54535 is the unauthorized disclosure of reminders data on affected Apple devices. While the vulnerability does not affect system integrity or availability, the exposure of reminders can lead to privacy violations, especially if reminders contain confidential or sensitive information such as meeting notes, personal schedules, or business-related tasks. For organizations, this could result in leakage of strategic or operational information if devices are compromised or shared among users. The requirement for prior access to calendar data limits the attack vector to insiders or malware that has already gained some foothold on the device. However, given the widespread use of Apple devices globally, the vulnerability poses a moderate risk to user privacy and data confidentiality. The absence of known exploits reduces immediate risk but does not eliminate the need for timely patching. Failure to remediate could expose users and organizations to targeted data reconnaissance or social engineering attacks leveraging leaked reminder content.

To mitigate CVE-2024-54535, organizations and users should promptly update all affected Apple devices to the fixed OS versions: iOS 18.1, iPadOS 18.1, macOS Sequoia 15.1, visionOS 2.1, and watchOS 11.1. Beyond patching, organizations should enforce strict access controls on calendar data to limit exposure to trusted applications and users only. Employ mobile device management (MDM) solutions to monitor and restrict app permissions related to calendar and reminders data. Regularly audit device access logs to detect any unauthorized access attempts to calendar data. Educate users about the risks of sharing calendar data and the importance of securing their devices with strong authentication methods. Consider encrypting sensitive reminders or using secure note-taking applications as an additional layer of protection. Finally, maintain up-to-date threat intelligence to detect any emerging exploit attempts targeting this vulnerability.