{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64896", "assignerOrgId": "7281d04a-a537-43df-bfb4-fa4110af9d01", "state": "PUBLISHED", "assignerShortName": "jci", "dateReserved": "2026-07-20T19:51:19.089Z", "datePublished": "2026-08-27T14:42:33.253Z", "dateUpdated": "2026-08-27T14:42:33.253Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "7281d04a-a537-43df-bfb4-fa4110af9d01", "shortName": "jci", "dateUpdated": "2026-08-27T14:42:33.253Z"}, "title": "T2000 open debug port", "datePublic": "2026-08-25T14:32:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "Debug and Test Interface With Improper Access Control"}]}], "impacts": [{"descriptions": [{"lang": "en", "value": "Accessing Functionality Not Properly Constrained by ACLs"}]}], "affected": [{"vendor": "Johnson Controls", "product": "T2000", "versions": [{"status": "affected", "version": "0", "lessThan": "31.6", "versionType": "custom"}], "defaultStatus": "unaffected"}], "cpeApplicability": [{"operator": "OR", "nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:johnson_controls:t2000:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndExcluding": "31.6"}]}]}], "descriptions": [{"lang": "en", "value": "Debug and Test Interface With Improper Access Control vulnerability in Johnson Controls T2000 allows Accessing Functionality Not Properly Constrained by ACLs.\n\nThis issue affects T2000: before 31.6.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "Debug and Test Interface With Improper Access Control vulnerability in Johnson Controls T2000 allows Accessing Functionality Not Properly Constrained by ACLs.<p>This issue affects T2000: before 31.6.</p>"}]}], "references": [{"url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "PHYSICAL", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "subConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "subIntegrityImpact": "NONE", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "MEDIUM", "baseScore": 5.2, "vectorString": "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"}}], "workarounds": [{"lang": "en", "value": "If immediate update is not possible, Johnson Controls recommends the following mitigations:\u00a0\n\n\n\n * \n\nRestrict physical access to the device by installing it in a secured equipment room that limits access to authorized service personnel only.\u00a0\n\n\n\n\n\n\n * \n\nImplement tamper-evident seals on device housings and panel enclosures to detect and deter unauthorized physical access attempts.\u00a0\n\n\n\n\n\n\n * \n\nConduct periodic physical inspections of device installations to identify signs of tampering, unauthorized cable connections, or enclosure breaches.\u00a0\n\n\n\n\n\n\n\n\nAdditional best-practice mitigations that end users can apply as a layer of defense:\u00a0\n\n\n\n * \n\nPhysically secure\u00a0the device\u00a0enclosure to prevent unauthorized access to internal circuit boards and ports.\u00a0\n\n\n\n\n\n\n * \n\nImplement authentication mechanisms on any accessible debug interfaces to restrict access to authorized service personnel only.\u00a0\n\n\n\n\n\n\n * \n\nMonitor physical access to device installations and implement tamper detection where possible.\u00a0\n\n\n\n\n\n\n * \n\nFollow the recommendations in the Johnson Controls Product Hardening Guide available at\u00a0 https://www.johnsoncontrols.com/trust-center/cybersecurity/resources .\u00a0\n\n\n\n\n\n\n\n\nThese mitigations reduce risk but may not fully remediate the vulnerability.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<div><p>If immediate update is not possible, Johnson Controls recommends the following mitigations:&nbsp;</p></div><div><ul><li><p>Restrict physical access to the device by installing it in a secured equipment room that limits access to authorized service personnel only.&nbsp;</p></li></ul></div><div><ul><li><p>Implement tamper-evident seals on device housings and panel enclosures to detect and deter unauthorized physical access attempts.&nbsp;</p></li></ul></div><div><ul><li><p>Conduct periodic physical inspections of device installations to identify signs of tampering, unauthorized cable connections, or enclosure breaches.&nbsp;</p></li></ul></div><div><p>Additional best-practice mitigations that end users can apply as a layer of defense:&nbsp;</p></div><div><ul><li><p>Physically secure&nbsp;the device&nbsp;enclosure to prevent unauthorized access to internal circuit boards and ports.&nbsp;</p></li></ul></div><div><ul><li><p>Implement authentication mechanisms on any accessible debug interfaces to restrict access to authorized service personnel only.&nbsp;</p></li></ul></div><div><ul><li><p>Monitor physical access to device installations and implement tamper detection where possible.&nbsp;</p></li></ul></div><div><ul><li><p>Follow the recommendations in the Johnson Controls Product Hardening Guide available at&nbsp;<a href=\"https://www.johnsoncontrols.com/trust-center/cybersecurity/resources\" target=\"_blank\" rel=\"noreferrer noopener\">https://www.johnsoncontrols.com/trust-center/cybersecurity/resources</a>.&nbsp;</p></li></ul></div><div><p>These mitigations reduce risk but may not fully remediate the vulnerability.&nbsp;&nbsp;</p></div>"}]}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.5"}}}}

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "T2000", "vendor": "Johnson Controls", "versions": [{"lessThan": "31.6", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "productsecurity@jci.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Debug and Test Interface With Improper Access Control vulnerability in Johnson Controls T2000 allows Accessing Functionality Not Properly Constrained by ACLs.\n\nThis issue affects T2000: before 31.6."}], "id": "CVE-2026-64896", "lastModified": "2026-08-27T17:19:23.820", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "PHYSICAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.2, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "productsecurity@jci.com", "type": "Secondary"}]}, "published": "2026-08-27T17:19:23.820", "references": [{"source": "productsecurity@jci.com", "url": "https://www.johnsoncontrols.com/trust-center/cybersecurity/security-advisories"}], "sourceIdentifier": "productsecurity@jci.com", "vulnStatus": "Received"}

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