CVE-2023-40529 is a vulnerability identified in Apple’s iOS and iPadOS platforms that allows an attacker with physical access to a device to leverage the VoiceOver accessibility feature to bypass intended privacy protections and access private calendar information. VoiceOver is designed to assist visually impaired users by reading screen content aloud. However, due to insufficient redaction of sensitive calendar data, an attacker can exploit this feature to extract calendar details without needing to unlock the device or authenticate. The vulnerability affects unspecified versions prior to iOS 17 and iPadOS 17, where Apple has implemented improved redaction techniques to prevent such data leakage. The CVSS v3.1 base score is 2.4, reflecting low severity, as the attack vector requires physical access (AV:P), no privileges (PR:N), no user interaction (UI:N), and only impacts confidentiality (C:L) without affecting integrity or availability. No known exploits have been reported in the wild. This vulnerability primarily threatens confidentiality of calendar data, which may include sensitive meeting details, appointments, or personal information. The attack complexity is low given physical access and the presence of VoiceOver, but the scope is limited to devices not updated to the latest OS versions. The vulnerability highlights the risk of relying on accessibility features without robust privacy controls and the importance of securing physical access to mobile devices.

For European organizations, the primary impact of CVE-2023-40529 is the potential unauthorized disclosure of sensitive calendar information, which could include confidential business meetings, strategic planning sessions, or personal appointments. This leakage could facilitate targeted social engineering, corporate espionage, or privacy violations. The vulnerability does not allow modification or disruption of data or device functionality, limiting its impact to confidentiality. However, given the widespread use of Apple devices in Europe, particularly in sectors such as finance, government, and technology, the risk of exposure is non-negligible if devices are left unattended or physically accessible to unauthorized individuals. Organizations with mobile workforces or those that handle sensitive scheduling data should be particularly vigilant. The absence of remote exploitation means the threat is mostly relevant in scenarios involving device theft, loss, or insider threats. The low CVSS score reflects the limited scope and complexity, but the sensitivity of calendar data in professional environments elevates the importance of mitigation.

To mitigate CVE-2023-40529, European organizations should prioritize updating all iOS and iPadOS devices to version 17 or later, where the vulnerability has been addressed with improved redaction of calendar data in VoiceOver. Additionally, organizations should enforce strict physical security policies for mobile devices, including locking devices when unattended, using strong passcodes, and enabling automatic device lock timers. Disabling VoiceOver or other accessibility features when not needed can reduce the attack surface. Training employees on the risks of leaving devices unattended and the importance of physical security is critical. For highly sensitive environments, consider implementing mobile device management (MDM) solutions that can enforce OS updates and restrict accessibility feature usage. Regular audits of device configurations and access logs can help detect potential misuse. Finally, organizations should monitor for any emerging exploits related to this vulnerability and apply patches promptly.