CVE-2025-30437 is a memory corruption vulnerability in Apple macOS identified as CWE-119, related to improper bounds checking that allows an application to corrupt coprocessor memory. The coprocessor in macOS handles specialized processing tasks, and corruption of its memory can lead to unauthorized data access or manipulation, undermining system integrity and confidentiality. This vulnerability does not require any privileges or user interaction, but the attack complexity is high, indicating that exploitation demands precise conditions or advanced techniques. The issue was addressed in macOS Sequoia 15.4 by implementing improved bounds checks to prevent out-of-bounds memory access. Although no public exploits are known, the vulnerability's presence in a widely used operating system makes it a significant risk. The CVSS v3.1 score of 7.4 reflects a high severity, with network attack vector, no privileges required, no user interaction, and high impact on confidentiality and integrity but no impact on availability. This vulnerability could be leveraged by malicious actors to execute arbitrary code or leak sensitive information by corrupting the coprocessor memory, potentially bypassing security controls. Organizations using macOS devices should prioritize patching and monitor for suspicious application behavior that might attempt to exploit this flaw.

For European organizations, the vulnerability poses a risk to the confidentiality and integrity of sensitive data processed on macOS devices. Sectors such as finance, government, healthcare, and critical infrastructure that use Apple hardware could face targeted attacks aiming to corrupt coprocessor memory to gain unauthorized access or disrupt operations. The lack of required privileges or user interaction lowers the barrier for remote exploitation, increasing the threat surface. However, the high attack complexity somewhat mitigates immediate widespread exploitation. Unpatched systems remain vulnerable to sophisticated attackers who could leverage this flaw for espionage or sabotage. The potential for data leakage or system compromise could lead to regulatory non-compliance under GDPR and damage to organizational reputation. The impact is amplified in environments where macOS devices are integrated into critical workflows or handle sensitive information.

1. Immediately update all macOS devices to version Sequoia 15.4 or later, where the vulnerability is patched. 2. Implement strict application whitelisting to prevent unauthorized or untrusted applications from executing, reducing the risk of exploitation by malicious apps. 3. Employ endpoint detection and response (EDR) solutions capable of monitoring for anomalous behavior indicative of memory corruption attempts or coprocessor misuse. 4. Conduct regular audits of installed applications and remove unnecessary or untrusted software to minimize attack vectors. 5. Educate users about the risks of installing unverified applications, even though user interaction is not required for exploitation, to reduce the likelihood of initial compromise. 6. For organizations with macOS device fleets, deploy centralized patch management and vulnerability scanning to ensure timely updates and detection of vulnerable systems. 7. Monitor security advisories from Apple and threat intelligence sources for any emerging exploitation techniques or indicators of compromise related to this vulnerability.