CVE-2025-43516 is a session management vulnerability identified in Apple macOS that impacts the Voice Control feature. Voice Control allows users to operate their Mac using voice commands, which involves transcribing spoken input. The vulnerability stems from inadequate session validation, permitting a user with Voice Control enabled to access and transcribe voice activity from another user on the same system. This cross-user transcription risk violates confidentiality by exposing potentially sensitive spoken information. The flaw is categorized under CWE-384 (Session Fixation), indicating improper session handling. It affects macOS versions prior to Sequoia 15.7.3, Sonoma 14.8.3, and Tahoe 26.2, where Apple implemented improved session checks to resolve the issue. The CVSS v3.1 base score is 3.3 (low), reflecting that exploitation requires local privileges (AV:L), low attack complexity (AC:L), and privileges (PR:L), but no user interaction (UI:N). The impact is limited to confidentiality loss without affecting integrity or availability. No public exploits or active exploitation have been reported. This vulnerability highlights the importance of robust session management in multi-user environments, especially for features handling sensitive data like voice transcription.

The primary impact of CVE-2025-43516 is a confidentiality breach where a user with Voice Control enabled can eavesdrop on or transcribe another user's voice activity on the same macOS device. This could lead to unauthorized disclosure of sensitive or private information spoken by other users. While the vulnerability does not affect system integrity or availability, the exposure of voice data could have privacy implications, especially in shared or multi-user environments such as corporate workstations, educational institutions, or public kiosks. The requirement for local privileges limits remote exploitation, reducing the overall risk for organizations with strict access controls. However, in environments where multiple users share a device or where user accounts are not strongly isolated, this vulnerability could be exploited to gather confidential information. The absence of known exploits in the wild and the low CVSS score suggest a limited but non-negligible threat, particularly for organizations handling sensitive voice data or requiring strict user privacy.

To mitigate CVE-2025-43516, organizations and users should promptly update affected macOS systems to the patched versions: Sequoia 15.7.3, Sonoma 14.8.3, or Tahoe 26.2. Beyond patching, administrators should review and restrict Voice Control usage to trusted users only, especially on shared or multi-user devices. Implement strict user account separation and limit local user privileges to reduce the risk of unauthorized access. Consider disabling Voice Control on systems where it is not essential or where sensitive voice data is handled. Additionally, monitor system logs for unusual Voice Control activity and educate users about the risks of enabling voice transcription features in shared environments. Employ endpoint security solutions that can detect anomalous local privilege escalations or suspicious session activities. Finally, enforce physical security controls to prevent unauthorized local access to macOS devices.