IM
IronMonkey Threat Research
‹ Back to ICS Advisories

Johnson Controls EasyIO Neo Series EC and CW Controllers

MEDIUM
CVSS 5.4
Date 2026-10-01T06:00:00+00:00
Source cisa-csaf
Published by CISA

// Description

Successful exploitation of this vulnerability could allow an attacker tointercept and read sensitive information, including credentials andsession data.

// Vulnerabilities (1)

CVE ID CVSS Score Severity Description
CVE-2026-64893 5.4 medium
Johnson Controls is aware of a vulnerability in EasyIO Neo which may allow an attacker to intercept and read sensitive information, including credentials and session data, transmitted in cleartext over the network. Successful exploitation could result in technical or operational impact. EasyIO Neo is a programmable building automation edge controller used to manage and automate HVAC, lighting, and energy systems in commercial buildings through a web-based interface.

// Remediations (6)

Mitigation: Johnson Controls released fixed versions for EasyIO Neo Series EC and CW Controllers. Users should u
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. HTTP communication has been disabled by default in the latest version. The fix is available in EC firmware V3.3b64 andCW firmware V3.3b26. Contact your Johnson Controls representative or visitthe Johnson Controls Trust Center.
Mitigation: The recommendations provided within Johnson Controls Hardening Guide should always be applied to min
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/cybersecurity/resources.
Mitigation: If immediate update is not possible, Johnson Controls recommends the following mitigations: Enable a
If immediate update is not possible, Johnson Controls recommends the following mitigations: Enable and enforce HTTPS/TLS for all web-based management access to the device. Disable HTTP access entirely. Place devices on an isolated, segmented network behind a firewall to limit exposure of management interfaces. Use a VPN when accessing devices remotely to encrypt all traffic in transit. Monitor network traffic for unencrypted sensitive data leaving the management interface. Restrict network access to management interfaces using access control lists (ACLs) to only trusted hosts. Refer to and follow all steps in the product hardening guide or the JCI universal hardening guide found here: https://www.johnsoncontrols.com/trust-center/cybersecurity/resources. These mitigations reduce risk but may not fully remediate the vulnerability. Users should update to the fixed versions when operationally feasible.
Mitigation: Before applying updates in production ICS/OT environments, users should review operational impact, b
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: For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI
For more detailed mitigation instructions, please see Johnson Controls Product Security Advisory JCI-PSA-2026-30.https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories
Mitigation: Users should review logs, network telemetry, device events, and security monitoring tools for activi
Users should review logs, network telemetry, device events, and security monitoring tools for activity involving EasyIO NEO versions EC and CW. Relevant detection information may include: Unencrypted HTTP traffic to or from the device management interface on port 80. Network captures showing cleartext credentials or session tokens in HTTP requests. Unexpected devices or IP addresses accessing the web management console. ARP spoofing or other man-in-the-middle indicators on the local network segment. Unauthorized configuration changes that may indicate credential interception.

// References