Trend Micro EUVD-2025-209915

Trend Micro Apex One for macOS is vulnerable to privilege escalation attacks by local users, creating a direct threat to endpoint security protection and system integrity across your Mac fleet. Without an available patch from the vendor, this exposure requires immediate compensating controls to prevent unauthorized access. The risk is elevated for organizations with shared systems or insider threat vulnerabilities.

Within 24 hours, create a complete inventory of all macOS systems running Trend Micro Apex One, noting system owners, user counts, and security criticality. Within 7 days, implement interim controls by restricting administrative account provisioning to essential personnel only, enabling privilege escalation detection and alerting, and directly contacting Trend Micro for patch availability and temporary mitigation guidance. By day 30, continue monitoring for patch release, test the effectiveness of compensating controls through security assessments, and establish a deployment plan to apply the patch immediately upon release.

No vendor-released patch identified at time of analysis. Interim mitigations include restricting local administrative account provisioning to essential personnel only, implementing behavioral monitoring for privilege escalation attempts, disabling non-essential Apex One agent components, requiring multi-factor authentication for any elevated access on affected systems, and conducting regular privilege escalation testing to validate control effectiveness.