Johnson Controls EasyIO Neo Series EC and CW Controllers

Successful exploitation of this vulnerability could allow an attacker to gain access to sensitive information that could be used to conduct further attacks against the system.

The following versions of Johnson Controls EasyIO Neo Series EC and CW Controllers are affected:

EasyIO Neo Series EC Controllers V3.3b63 (CVE-2026-64892)

EasyIO Neo Series EC Controllers V3.3b62 (CVE-2026-64892)

EasyIO Neo Series CW Controllers V3.3b25 (CVE-2026-64892)

EasyIO Neo Series CW Controllers V3.3b24 (CVE-2026-64892)

Critical Infrastructure Sectors: Critical Manufacturing, Commercial Facilities, Government Services and Facilities, Transportation Systems, Energy

Countries/Areas Deployed: Worldwide

Company Headquarters Location: Ireland

Johnson Controls is aware of a vulnerability in EasyIO Neo Series EC and CW Controllers relating to an attacker gaining access to sensitive information that could be used to conduct further attacks against the system. The EC and CW are programmable edge controllers designed for building automation and control systems, used to manage and automate various building functions including HVAC, lighting, and energy management, supporting open protocols such as BACnet and Modbus for adaptable system connections.

Mitigation Johnson Controls released fixed versions for EasyIO Neo Series EC and CW Controllers. Users should upgrade to the fixed version or later as soon as operationally feasible. The fix is available in EC firmware V3.3b64 and CW firmware V3.3b26. your Johnson Controls representative or authorized EasyIO distributor.

Mitigation Before applying updates in production ICS/OT environments, users should review operational impact, backup relevant configurations, test updates in a non-production environment where feasible, and follow applicable change-management and safety procedures.

Mitigation If immediate update is not possible, Johnson Controls recommends the following mitigations:

Implement physical access controls to prevent unauthorized personnel from reaching device debug ports.

Monitor network traffic to and from affected devices for unusual or unauthorized access attempts.

Apply the principle of least privilege to all accounts and services that interact with the affected devices.

Where possible, apply firmware updates that disable debug interfaces or require authentication before granting debug access.

Implement intrusion detection/prevention systems to monitor for exploitation attempts.

Refer to and follow all steps in the product hardening guide or the JCI universal hardening guide found here: .

These mitigations reduce risk but may not fully remediate the vulnerability. Users should update to the fixed versions when operationally feasible.

Mitigation For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-20.

Relevant CWE: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Gabriele Gardois reported this vulnerability to Johnson Controls

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Recommended Practices

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

The recommendations provided within Johnson Controls Hardening Guide should always be applied to minimize security risk. Visit the Johnson Controls Trust Center Cybersecurity website to access the latest Hardening Guidelines and cybersecurity best practices - .

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets.

Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.

No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time.

Initial Release Date: 2026-10-01

Legal Notice and Terms of Use

This product is provided subject to this Notification and this Privacy & Use policy.

Johnson Controls, Inc