CVE-2025-43187 is a vulnerability in the Apple macOS operating system affecting the hdiutil command-line utility, which is used for manipulating disk images. The vulnerability arises because running certain hdiutil commands may unexpectedly trigger execution of arbitrary code. This behavior indicates a flaw in how hdiutil processes input or command parameters, potentially allowing an attacker with limited privileges to escalate their capabilities by executing malicious code. The vulnerability affects multiple recent macOS versions, including Sonoma 14.7.7, Ventura 13.7.7, and Sequoia 15.6. Apple addressed the issue by removing the vulnerable code path entirely, indicating the root cause was likely a design or implementation flaw that could not be safely patched otherwise. The CVSS v3.1 base score is 7.8, reflecting high severity due to the combination of local attack vector, low attack complexity, low privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. Although no known exploits are currently reported in the wild, the vulnerability's characteristics make it a significant risk for local attackers aiming to gain elevated control over macOS systems. The vulnerability is particularly concerning for environments where users have local shell access or where automated scripts invoke hdiutil commands, as these could be manipulated to trigger code execution.

The impact of CVE-2025-43187 is substantial for organizations relying on macOS systems. Successful exploitation allows local attackers with limited privileges to execute arbitrary code, potentially leading to full system compromise. This can result in unauthorized access to sensitive data, alteration or destruction of system files, and disruption of system availability. In enterprise environments, this could facilitate lateral movement, privilege escalation, and deployment of persistent malware or ransomware. The vulnerability undermines the security assurances of macOS endpoints, which are often used in high-value sectors such as technology, finance, creative industries, and government. Given the widespread use of macOS in certain regions and industries, unpatched systems represent a critical attack surface. Although exploitation requires local access, insider threats, compromised user accounts, or malware with limited privileges could leverage this flaw to escalate privileges and deepen system control.

To mitigate CVE-2025-43187, organizations should immediately apply the security updates released by Apple for macOS Sonoma 14.7.7, Ventura 13.7.7, and Sequoia 15.6, which remove the vulnerable code. Beyond patching, organizations should restrict local access to macOS systems to trusted users only and enforce the principle of least privilege to minimize the risk of exploitation by low-privileged users. Monitoring and restricting the use of hdiutil commands via endpoint security tools or application control policies can reduce attack vectors. Additionally, implementing robust logging and alerting on suspicious command executions involving disk image utilities can help detect exploitation attempts. Regularly auditing user accounts and privileges, combined with endpoint detection and response (EDR) solutions tailored for macOS, will enhance detection and response capabilities. Organizations should also educate users about the risks of executing untrusted commands or scripts that invoke system utilities like hdiutil.