CVE-2025-43302 is a medium severity vulnerability classified under CWE-787 (Out-of-bounds Write) that affects Apple’s iOS and iPadOS platforms, as well as other Apple operating systems such as macOS Sequoia, Sonoma, Tahoe, tvOS, visionOS, and watchOS. The root cause is an out-of-bounds write due to insufficient bounds checking within system components that handle app operations. A maliciously crafted app can exploit this flaw to write outside the intended memory boundaries, leading to memory corruption and causing unexpected system termination or crashes. This vulnerability impacts system availability but does not directly compromise confidentiality or integrity. Exploitation requires local access to the device and user interaction (installing or running a malicious app). Apple addressed this issue in iOS 18.7, iPadOS 18.7, and corresponding versions of other OSes, improving bounds checking to prevent out-of-bounds writes. No public exploits or active exploitation in the wild have been reported as of the publication date. The vulnerability’s CVSS vector (AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H) reflects that it is exploitable with low complexity, no privileges, but requires user interaction and affects availability only.

The primary impact of CVE-2025-43302 is denial of service through unexpected system termination or crashes on affected Apple devices. This can disrupt normal device operation, causing inconvenience to users and potential loss of unsaved data. For organizations, especially those relying heavily on Apple devices for critical operations, this vulnerability could be leveraged by attackers to degrade productivity or disrupt services by causing repeated device crashes. While it does not allow data theft or code execution, the availability impact can be significant in environments where device uptime is critical, such as healthcare, finance, or enterprise mobile deployments. The requirement for local access and user interaction limits remote exploitation but does not eliminate risk, especially in scenarios where users may be tricked into installing malicious apps or opening malicious content. The broad range of affected Apple OS versions and devices increases the scope of potential impact globally.

To mitigate CVE-2025-43302, organizations and users should promptly update all affected Apple devices to the patched OS versions (iOS and iPadOS 18.7 or later, macOS Sequoia 15.7, Sonoma 14.8, Tahoe 26, tvOS 26, visionOS 26, watchOS 26). Restrict installation of apps to trusted sources such as the official Apple App Store to reduce the risk of malicious apps exploiting this vulnerability. Employ mobile device management (MDM) solutions to enforce OS update policies and control app installations. Educate users about the risks of installing untrusted applications and the importance of applying system updates. Monitor devices for unusual crashes or instability that could indicate attempted exploitation. Additionally, consider implementing application whitelisting and runtime protection mechanisms where feasible to detect and block malicious behaviors. Since no exploits are known in the wild, proactive patching remains the most effective defense.