CVE-2026-64896

T2000 open debug port

Published Aug 27, 2026 CVSS 4.0 · 5.2 Medium EPSS < 1% KEV · Not listed
Description
Debug and Test Interface With Improper Access Control vulnerability in Johnson Controls T2000 allows Accessing Functionality Not Properly Constrained by ACLs.

This issue affects T2000: before 31.6.

Remediation

Vendor Workaround

If immediate update is not possible, Johnson Controls recommends the following mitigations:  * Restrict physical access to the device by installing it in a secured equipment room that limits access to authorized service personnel only.  * Implement tamper-evident seals on device housings and panel enclosures to detect and deter unauthorized physical access attempts.  * Conduct periodic physical inspections of device installations to identify signs of tampering, unauthorized cable connections, or enclosure breaches.  Additional best-practice mitigations that end users can apply as a layer of defense:  * Physically secure the device enclosure to prevent unauthorized access to internal circuit boards and ports.  * Implement authentication mechanisms on any accessible debug interfaces to restrict access to authorized service personnel only.  * Monitor physical access to device installations and implement tamper detection where possible.  * Follow the recommendations in the Johnson Controls Product Hardening Guide available at  https://www.johnsoncontrols.com/trust-center/cybersecurity/resources .  These mitigations reduce risk but may not fully remediate the vulnerability.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-284
CWE-732
Type Values Removed Values Added
Description Debug and Test Interface With Improper Access Control vulnerability in Johnson Controls T2000 allows Accessing Functionality Not Properly Constrained by ACLs. This issue affects T2000: before 31.6.
Title T2000 open debug port
First Time appeared Johnson Controls
Johnson Controls t2000
CPEs cpe:2.3:a:johnson_controls:t2000:*:*:*:*:*:*:*:*
Vendors & Products Johnson Controls
Johnson Controls t2000
References
Metrics cvssV4_0

{'score': 5.2, 'vector': 'CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
jci
Published
Updated
Aug 27, 2026, 7:31 PM
Reserved
Jul 20, 2026, 7:51 PM
Status
Awaiting Analysis
Published
Aug 27, 2026, 5:19 PM
Modified
Sep 3, 2026, 5:31 PM