CVE-2026-64896T2000 open debug port
- 5.2MediumCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By jci
- 38 days later
· 38 days later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| jciCNA (assigner) | 4.0 | Medium5.2 | 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 |
| NVDNVD · Awaiting Analysis | 4.0 | Medium5.2 | 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 (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.2.
Affected products
- affected < 31.6
What to do
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.
References
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-67140 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64896)Record last updated .