
CVE-2026-64892: Johnson Controls EasyIO Neo Debug Interface Vulnerability Exposes Building Systems
Johnson Controls disclosed CVE-2026-64892, a vulnerability in EasyIO Neo Series EC and CW Controllers that allows unauthorized access to sensitive information through exposed debug interfaces. The vulnerability affects building automation systems worldwide, including HVAC, lighting, and energy management controllers used in critical infrastructure sectors. Successful exploitation could enable attackers to gather system intelligence for follow-on attacks against operational technology environments. Johnson Controls released firmware patches (EC V3.3b64 and CW V3.3b26) and recommends implementing physical access controls and network monitoring as interim mitigations. This incident highlights the growing attack surface in IoT and OT environments, where legacy debug interfaces and insufficient access controls create persistent vulnerabilities that threat actors increasingly target to establish footholds in critical infrastructure systems.
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