T2000 open debug port
Summary
| CVE | CVE-2026-64896 |
|---|---|
| State | PUBLISHED |
| Assigner | jci |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-27 17:19:23 UTC |
| Updated | 2026-09-03 17:31:04 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 5.2 MEDIUM from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.001460000 probability, percentile 0.041900000 (date 2026-09-07)
Problem Types: CWE-284 | CWE-732 | Debug and Test Interface With Improper Access Control | CWE-284 CWE-284 Improper Access Control | CWE-732 CWE-732 Incorrect Permission Assignment for Critical Resource
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 5.2 | MEDIUM | 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/E:X/C... |
| 4.0 | CNA | CVSS | 5.2 | MEDIUM | 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 |
CVSS v4.0 Breakdown
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Johnson Controls | T2000 | affected 31.6 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories | [email protected] | www.johnsoncontrols.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Workarounds
CNA: 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.