Johnson Controls EasyIO Neo Series EC and CW Controllers
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Summary
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)
CVSS
Vendor
Equipment
Vulnerabilities
v3 3.5
Johnson Controls
Johnson Controls EasyIO Neo Series EC and CW Controllers Exposure of Sensitive Information to an Unauthorized Actor
Background
Critical Infrastructure Sectors: Critical Manufacturing, Commercial Facilities, Government Services and Facilities, Transportation Systems, Energy Countries/Areas Deployed: Worldwide Company Headquarters Location: Ireland
Vulnerabilities
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CVE-2026-64892
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. View CVE Details
Affected Products
Johnson Controls EasyIO Neo Series EC and CW Controllers
Vendor:Johnson Controls
Product Version:Johnson Controls EasyIO Neo Series EC Controllers: V3.3b63, Johnson Controls EasyIO Neo Series EC Controllers: V3.3b62, Johnson Controls EasyIO Neo Series CW Controllers: V3.3b25, Johnson Controls EasyIO Neo Series CW Controllers: V3.3b24
Product Status:known_affected
Remediations
MitigationJohnson 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. Contact your Johnson Controls representative or authorized EasyIO distributor.
MitigationBefore 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. MitigationIf 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:
https://www.johnsoncontrols.com/trust-cen ter/cybersecurity/resources .
These mitigations reduce risk but may not fully remediate the vulnerability. Users should update to the fixed versions when operationally feasible. MitigationFor more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-20.
https://www.johnsoncontrols .com/trust-center/cybersecurity/security-advisories
Relevant CWE: CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Metrics
CVSS Version
Base Score
Base Severity
Vector String
3.1
3.5
LOW
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:L
4.0
4.8
MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N
Acknowledgments
Gabriele Gardois reported this vulnerability to Johnson Controls
Legal Notice and Terms of Use
This product is provided subject to this Notification (
https://www.cisa.gov/notification) and this Privacy & Use policy (
https://www.cisa.gov/privacy-policy).
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 -
https://www.johnsoncontrols.com/trust-center/cyb ersecurity/security-advisories .
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.
Revision History
Initial Release Date: 2026-10-01
Date
Revision
Summary
2026-10-01
1
Initial Republication of Johnson Controls Product Security Advisory JCI-PSA-2026-20
Legal Notice and Terms of Use
https://www.cisa.gov/news-events/ics-advisories/icsa-26-274-04
2026-10-01 12:00 UTC
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