CVE-2025-43436 is a vulnerability identified in Apple’s iOS and iPadOS platforms, including macOS Tahoe, tvOS, visionOS, and watchOS versions 26.1 and earlier. The core issue is a permissions flaw that allowed applications to enumerate the list of installed apps on a user’s device without requiring any permissions or user interaction. This enumeration can reveal sensitive information about the user’s app usage patterns, potentially exposing private or security-sensitive applications installed on the device. The vulnerability is classified under CWE-288 (Authentication Issues), indicating a failure to properly restrict access to sensitive information. Apple addressed this issue by implementing additional restrictions in iOS 26.1 and corresponding OS updates, preventing unauthorized app enumeration. The CVSS v3.1 base score is 7.5 (high), reflecting that the vulnerability is remotely exploitable over the network, requires no privileges or user interaction, and results in high confidentiality impact without affecting integrity or availability. Although no known exploits have been reported in the wild, the ease of exploitation and the privacy implications make this a significant concern. The vulnerability affects all devices running vulnerable OS versions prior to 26.1, emphasizing the importance of timely patching.

The primary impact of CVE-2025-43436 is the compromise of user privacy through unauthorized disclosure of installed applications. This can enable attackers to profile users, infer sensitive interests or behaviors, and potentially identify targets for further attacks such as phishing or social engineering. For organizations, this vulnerability could expose the presence of security or enterprise apps, revealing internal tools or security postures. While the vulnerability does not allow direct code execution or system compromise, the confidentiality breach can facilitate more targeted and sophisticated attacks. Since exploitation requires no privileges or user interaction, any malicious app installed on a device can leverage this flaw, increasing the risk surface. The widespread use of Apple devices globally means that a large user base is potentially affected if not updated. Privacy-conscious sectors such as finance, healthcare, and government are particularly at risk due to the sensitivity of installed applications they may use.

To mitigate CVE-2025-43436, organizations and users should promptly update all affected Apple devices to iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, or watchOS 26.1 as applicable. This update includes the necessary permission restrictions to prevent unauthorized app enumeration. Additionally, organizations should enforce strict app vetting policies to prevent installation of untrusted or malicious applications that could exploit this vulnerability. Employ Mobile Device Management (MDM) solutions to monitor installed apps and restrict app installations to trusted sources only. Developers should review their apps for unnecessary permissions and ensure they do not attempt to enumerate installed apps, which could raise privacy concerns. Users should be educated about the risks of installing apps from unknown developers and encouraged to keep their devices updated. Network-level monitoring for unusual app behavior may also help detect exploitation attempts. Finally, Apple should be engaged to provide detailed patch notes and encourage adoption through security advisories.