CVE-2025-43187 is a vulnerability identified in the hdiutil utility of Apple macOS, which is responsible for managing disk images. The issue arises because running certain hdiutil commands may unexpectedly trigger execution of arbitrary code, likely due to improper handling of input or internal command processing flaws. This vulnerability affects multiple macOS versions before the patched releases: Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7. The CVSS v3.1 score is 7.8, indicating high severity, with an attack vector of local (AV:L), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), and impacting confidentiality, integrity, and availability (C:H/I:H/A:H). The vulnerability allows an attacker with local access to escalate privileges or execute arbitrary code, potentially leading to full system compromise. Apple mitigated the issue by removing the vulnerable code paths. Although no exploits are currently known in the wild, the vulnerability poses a significant risk due to the critical nature of arbitrary code execution and the widespread use of macOS in enterprise and personal environments.

The impact of CVE-2025-43187 is substantial for organizations running vulnerable macOS versions. An attacker with local access and limited privileges can exploit this flaw to execute arbitrary code, potentially escalating privileges to root or system level. This can lead to full system compromise, including unauthorized access to sensitive data, installation of persistent malware, disruption of system availability, and undermining system integrity. Given macOS's prevalence in enterprise environments, especially in sectors like technology, creative industries, and education, exploitation could result in significant operational disruption and data breaches. The lack of required user interaction lowers the barrier for exploitation once local access is obtained, increasing risk. Organizations relying on macOS for critical workloads or handling sensitive information are particularly at risk.

To mitigate CVE-2025-43187, organizations should immediately apply the security updates provided by Apple: macOS Sequoia 15.6, Sonoma 14.7.7, and Ventura 13.7.7 or later. Beyond patching, restrict local access to macOS systems by enforcing strict access controls and limiting user privileges to the minimum necessary. Employ endpoint detection and response (EDR) solutions to monitor for unusual hdiutil command usage or suspicious process execution. Regularly audit and harden macOS configurations, disable unnecessary services, and enforce strong authentication mechanisms to reduce the risk of local compromise. Additionally, educate users about the risks of executing untrusted commands and scripts. For environments with high security requirements, consider application whitelisting to prevent unauthorized code execution. Maintain up-to-date backups and incident response plans to recover quickly if exploitation occurs.