CVE-2025-43497 is a sandbox escape vulnerability in Apple macOS identified as an access control issue (CWE-862). The sandbox mechanism in macOS is designed to isolate applications, restricting their access to system resources and user data to prevent malicious behavior. This vulnerability arises from insufficient sandbox restrictions that allow an application to break out of its sandbox confinement. The flaw could enable a local attacker with limited privileges to escalate their access beyond the sandbox boundaries, potentially accessing sensitive information or interfering with other processes. The CVSS v3.1 score of 5.2 reflects a medium severity, with an attack vector limited to local access (AV:L), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), and a scope change (S:C) indicating that the vulnerability affects resources beyond the initially compromised component. The impact includes limited confidentiality and integrity loss but no availability impact. The vulnerability was addressed by Apple in macOS Tahoe 26.1 through additional sandbox restrictions that close the access control gap. No public exploits have been reported, but the potential for sandbox escape makes this a significant concern for environments relying on macOS sandboxing for security containment.

The primary impact of CVE-2025-43497 is the potential for a malicious or compromised application to escape the sandbox environment, which undermines one of the core security mechanisms in macOS. This could lead to unauthorized access to sensitive data, privilege escalation, and interference with other applications or system components. While the vulnerability does not directly affect system availability, the breach of confidentiality and integrity can facilitate further attacks such as data exfiltration or persistence mechanisms. Organizations that rely heavily on sandboxing for application isolation, such as software developers, enterprises with strict data protection requirements, and users running untrusted or third-party applications, are at risk. The requirement for local access and low privileges means that attackers must first gain some foothold on the system, but once achieved, the sandbox escape can significantly elevate their capabilities. The absence of known exploits in the wild reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits after public disclosure.

1. Apply the macOS Tahoe 26.1 update promptly to ensure the vulnerability is patched. 2. Enforce strict application installation policies, limiting software sources to trusted vendors and the Apple App Store to reduce the risk of malicious apps gaining local access. 3. Implement endpoint detection and response (EDR) solutions capable of monitoring for anomalous behaviors indicative of sandbox escape attempts. 4. Use macOS built-in security features such as System Integrity Protection (SIP) and Gatekeeper to further restrict unauthorized code execution. 5. Regularly audit and minimize user privileges to reduce the likelihood of attackers gaining the low-level access required to exploit this vulnerability. 6. Educate users about the risks of installing untrusted applications and the importance of system updates. 7. For high-security environments, consider additional sandboxing or containerization layers and monitor inter-process communications for suspicious activity.