CVE-2025-43275 is a critical security vulnerability identified in Apple macOS operating systems, specifically addressed in macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7. The vulnerability arises from a race condition (CWE-362) related to sandbox enforcement mechanisms. A race condition occurs when the timing of events leads to unexpected behavior, in this case allowing an application to bypass the sandbox restrictions designed to isolate it from the rest of the system. This sandbox breakout enables the malicious app to execute code outside its confined environment, potentially gaining unauthorized access to system resources, sensitive data, or higher privileges. The vulnerability requires no privileges or user interaction to exploit, making it highly accessible to attackers. The CVSS v3.1 base score of 9.8 reflects the vulnerability's critical nature, with attack vector being network (remote), low attack complexity, no privileges required, and no user interaction needed. The impact covers confidentiality, integrity, and availability, meaning attackers can fully compromise affected systems. Although no known exploits have been observed in the wild yet, the severity and ease of exploitation make it a significant threat. The root cause was addressed by adding additional validation checks to prevent the race condition. This vulnerability affects multiple macOS versions prior to the patched releases, indicating a broad attack surface across Apple user environments.

The potential impact of CVE-2025-43275 is severe for organizations worldwide using vulnerable macOS versions. Successful exploitation allows attackers to escape the sandbox, effectively breaking the core security boundary that isolates applications. This can lead to unauthorized access to sensitive data, execution of arbitrary code with elevated privileges, and potential full system compromise. Confidentiality is at risk as attackers can access private user data and system files. Integrity can be compromised through unauthorized modification of system components or data. Availability may be affected if attackers disrupt system operations or deploy ransomware. The lack of required privileges or user interaction lowers the barrier for exploitation, increasing the likelihood of attacks. Organizations relying on macOS for critical infrastructure, development, or sensitive operations face heightened risks. The vulnerability also undermines trust in application isolation, potentially enabling malware persistence and lateral movement within networks. Although no exploits are currently known in the wild, the critical severity demands proactive defense to prevent future attacks.

1. Immediately update all affected macOS systems to the patched versions: macOS Sequoia 15.6, Sonoma 14.7.7, or Ventura 13.7.7. 2. Implement application whitelisting to restrict execution of untrusted or unknown applications that might attempt sandbox escape. 3. Employ runtime monitoring and behavioral analysis tools to detect anomalous application behavior indicative of sandbox breakout attempts. 4. Restrict network exposure of macOS systems where possible to reduce attack surface, especially for systems running older versions pending patching. 5. Conduct regular audits of installed applications and remove unnecessary or suspicious software. 6. Use endpoint detection and response (EDR) solutions configured to alert on privilege escalation and sandbox escape indicators. 7. Educate users and administrators about the risks of running untrusted applications and the importance of timely patching. 8. For high-security environments, consider additional sandboxing or containerization layers to provide defense in depth. 9. Monitor threat intelligence sources for any emerging exploit code or attack campaigns targeting this vulnerability to enable rapid response.