CVE-2025-43320 is a vulnerability in Apple macOS that permits an application to bypass launch constraint protections designed to restrict unauthorized code execution. This flaw allows a malicious app to execute code with elevated privileges, effectively escalating its access rights beyond intended limits. The issue was addressed by Apple through additional logic in the system’s launch constraints, with fixes released in macOS Tahoe 26 and macOS Sequoia 15.7.3. The vulnerability is classified under CWE-269 (Improper Privilege Management), indicating that the system fails to enforce proper privilege boundaries during app launch. The CVSS v3.1 base score is 7.8, reflecting a high severity level due to the combination of local attack vector, low attack complexity, required privileges at a low level, no user interaction, and high impact on confidentiality, integrity, and availability. Exploitation requires the attacker to have local access with limited privileges but does not require user interaction, making it a potent vector for privilege escalation attacks. Although no exploits are currently known in the wild, the vulnerability presents a significant risk if leveraged by attackers to gain full system control. The lack of specified affected versions suggests that multiple macOS releases prior to the patches may be vulnerable. This vulnerability undermines the macOS security model by allowing malicious code to circumvent protections intended to prevent unauthorized execution and privilege escalation.

The impact of CVE-2025-43320 is substantial for organizations worldwide using macOS systems. Successful exploitation enables attackers to escalate privileges from a low-privilege user to elevated system-level access, compromising confidentiality by exposing sensitive data, integrity by allowing unauthorized modifications, and availability by potentially disrupting system operations. This can lead to full system compromise, enabling installation of persistent malware, data exfiltration, and lateral movement within networks. Organizations relying on macOS for critical infrastructure, development environments, or sensitive data processing face heightened risks. The vulnerability’s local attack vector means that attackers must gain initial access, but once inside, they can leverage this flaw to deepen their foothold. This elevates the threat posed by insider threats, compromised user accounts, or attackers exploiting other vulnerabilities to gain initial access. The absence of known exploits in the wild currently reduces immediate risk, but the high severity and ease of exploitation without user interaction make it a prime target for future attacks. Failure to patch promptly could result in significant operational and reputational damage, especially for sectors such as finance, healthcare, government, and technology that often use macOS devices.

To mitigate CVE-2025-43320 effectively, organizations should: 1) Immediately apply the official patches released in macOS Tahoe 26 and macOS Sequoia 15.7.3 to ensure the vulnerability is remediated. 2) Enforce strict application whitelisting and restrict installation of apps to trusted sources such as the Apple App Store or verified enterprise repositories. 3) Implement robust endpoint detection and response (EDR) solutions capable of identifying suspicious local privilege escalation attempts and anomalous process launches. 4) Limit local user privileges by adhering to the principle of least privilege, reducing the attack surface for exploitation. 5) Monitor system logs and audit trails for unusual activity related to app launches and privilege escalations. 6) Educate users on the risks of installing untrusted software and maintain strong access controls to prevent unauthorized local access. 7) Consider deploying macOS security features such as System Integrity Protection (SIP) and Apple’s Endpoint Security framework to add layers of defense. 8) Regularly review and update security policies to incorporate emerging threats and ensure compliance with patch management best practices.