CVE-2024-40844 is a privacy vulnerability identified in Apple’s iOS, iPadOS, and macOS platforms that allows an app to observe data displayed by the Shortcuts app. The root cause lies in the improper handling of temporary files used by Shortcuts, which may expose sensitive information to other apps with certain privileges. Specifically, an app with limited privileges (local access and low user interaction) can access temporary files that should be isolated, thereby breaching data confidentiality. The vulnerability does not impact data integrity or system availability, nor does it require user interaction to be exploited, increasing the risk of silent data exposure. Apple fixed this issue in iOS 17.7, iPadOS 17.7, macOS Sequoia 15, macOS Sonoma 14.7, and macOS Ventura 13.7 by improving the management and isolation of temporary files. The CVSS v3.1 score of 5.5 reflects a medium severity, considering the attack vector is local, requires low privileges, and has no user interaction but results in high confidentiality impact. No public exploits have been reported yet, but the vulnerability highlights the importance of secure temporary file handling in mobile and desktop operating systems.

The primary impact of CVE-2024-40844 is the unauthorized disclosure of sensitive data displayed by the Shortcuts app on affected Apple devices. This can lead to privacy breaches where malicious or compromised apps can silently observe confidential information without user consent or awareness. For organizations, this could mean leakage of sensitive operational data, personal information, or credentials if such data is processed or displayed via Shortcuts workflows. Although the vulnerability does not affect system integrity or availability, the confidentiality breach can undermine trust in Apple platforms and potentially facilitate further targeted attacks or espionage. The requirement for local access and low privileges limits remote exploitation but does not eliminate risk, especially in environments where devices may be physically accessed or compromised by malware. The lack of known exploits in the wild reduces immediate risk but does not preclude future exploitation attempts.

To mitigate CVE-2024-40844, organizations and users should promptly update all affected Apple devices to the patched versions: iOS 17.7, iPadOS 17.7, macOS Sequoia 15, macOS Sonoma 14.7, and macOS Ventura 13.7. Beyond patching, organizations should enforce strict app installation policies to prevent unauthorized or untrusted apps from being installed, reducing the risk of local exploitation. Employ mobile device management (MDM) solutions to monitor and control app permissions, especially those that can access local files or run background processes. Educate users about the risks of installing apps from unverified sources and the importance of device physical security to prevent local access attacks. Additionally, review and limit the use of Shortcuts workflows that handle highly sensitive data to minimize exposure. Regularly audit device security configurations and monitor for unusual app behaviors that could indicate exploitation attempts.