CVE-2025-43252 is a vulnerability identified in Apple macOS related to the handling of symbolic links (symlinks) when accessed via web content. Specifically, a website can exploit the way macOS resolves symlinks to gain unauthorized access to sensitive user data. The root cause is linked to CWE-59 (Improper Link Resolution Before File Access), where the operating system fails to adequately verify or restrict symlink resolution, potentially allowing a malicious website to traverse file system links and expose confidential information. The vulnerability does not require any privileges or authentication but does require user interaction, as exploitation involves a prompt requesting user consent. Apple mitigated this issue by introducing an additional user consent prompt in macOS Sequoia 15.6, ensuring users explicitly approve access when symlinks are resolved in this context. The CVSS v3.1 base score is 6.5 (medium severity), reflecting the network attack vector, low attack complexity, no privileges required, user interaction needed, and high confidentiality impact without affecting integrity or availability. No known exploits have been reported in the wild as of the publication date. This vulnerability primarily threatens the confidentiality of user data, particularly in environments where users browse untrusted websites or interact with potentially malicious web content.

The primary impact of CVE-2025-43252 is the unauthorized disclosure of sensitive user data on macOS systems. Since the vulnerability allows websites to bypass normal file access restrictions via symlink resolution, attackers could potentially access private files, credentials, or other confidential information stored on the user's device. This can lead to privacy breaches, identity theft, or further targeted attacks leveraging exposed data. The requirement for user interaction (a consent prompt) reduces the likelihood of automated exploitation but does not eliminate risk, especially if users are tricked into granting access. Organizations with macOS endpoints, particularly those in sectors handling sensitive data such as finance, healthcare, and government, face increased risk of data leakage. The vulnerability does not affect system integrity or availability, so it is less likely to cause system disruption or data modification. However, the confidentiality breach alone can have severe consequences including regulatory penalties and loss of customer trust.

To mitigate CVE-2025-43252, organizations and users should promptly update all macOS devices to version Sequoia 15.6 or later, where the vulnerability is fixed by the addition of an explicit user consent prompt during symlink resolution. Beyond patching, organizations should implement user awareness training focused on recognizing and responding cautiously to unexpected permission prompts, especially those originating from web browsers. Employing endpoint security solutions that monitor and restrict unauthorized file system access can provide an additional layer of defense. Network-level protections such as web filtering and blocking access to known malicious websites can reduce exposure to exploit attempts. For high-security environments, consider restricting or sandboxing web browser capabilities to limit file system interactions. Regular audits of macOS systems for unusual file access patterns may help detect exploitation attempts early. Finally, maintain an up-to-date inventory of macOS devices to ensure timely patch deployment.