{"api_version":"1","generated_at":"2026-05-30T20:03:57+00:00","cve":"CVE-2021-42534","urls":{"html":"https://cve.report/CVE-2021-42534","api":"https://cve.report/api/cve/CVE-2021-42534.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-42534","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-42534"},"summary":{"title":"CVE-2021-42534","description":"The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.","state":"PUBLIC","assigner":"ics-cert@hq.dhs.gov","published_at":"2021-10-22 14:15:00","updated_at":"2021-10-27 16:07:00"},"problem_types":["CWE-79"],"metrics":[],"references":[{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02","name":"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02","refsource":"CONFIRM","tags":[],"title":"Trane HVAC Systems Controls | CISA","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-42534","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-42534","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[{"source":"LEGACY","value":"Chizuru Toyama of TXOne IoT/ICS Security Research Labs of Trend Micro reported this vulnerability to CISA.","lang":""}],"nvd_cpes":[{"cve_year":"2021","cve_id":"42534","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"trane","cpe5":"tracer_sc","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"42534","vulnerable":"1","versionEndIncluding":"3.8","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"trane","cpe5":"tracer_sc_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"CVE_data_meta":{"ASSIGNER":"ics-cert@hq.dhs.gov","DATE_PUBLIC":"2021-10-19T15:34:00.000Z","ID":"CVE-2021-42534","STATE":"PUBLIC","TITLE":"Trane Building Automation Controllers Cross-site Scripting"},"affects":{"vendor":{"vendor_data":[{"product":{"product_data":[{"product_name":"Tracer SC","version":{"version_data":[{"version_affected":"<=","version_name":"All","version_value":"3.8"}]}}]},"vendor_name":"Trane"}]}},"credit":[{"lang":"eng","value":"Chizuru Toyama of TXOne IoT/ICS Security Research Labs of Trend Micro reported this vulnerability to CISA."}],"data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms."}]},"generator":{"engine":"Vulnogram 0.0.9"},"impact":{"cvss":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","version":"3.1"}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-79 Cross-site Scripting (XSS)"}]}]},"references":{"reference_data":[{"name":"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02","refsource":"CONFIRM","url":"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02"}]},"solution":[{"lang":"eng","value":"Trane has identified the following specific mitigations for the affected products:\n\nUsers upgrade Tracer SC controllers running firmware v3.8 and prior,  to firmware  v4.4 SP7 or higher. Users should contact a regional Trane office to install updated firmware or request additional information and reference Trane service database number HUB-207592.\nTracer SC is no longer actively developed, tested, or sold. Tracer SC will be considered end-of-life on December 31, 2022. Trane recommends users identify a migration plan to replace the Tracer SC controller with  the Tracer SC+ controller, which can function as a drop-in replacement for Tracer SC, providing significant security upgrades."}],"source":{"advisory":"https://us-cert.cisa.gov/ics/advisories/icsa-21-292-02","discovery":"UNKNOWN"}},"nvd":{"publishedDate":"2021-10-22 14:15:00","lastModifiedDate":"2021-10-27 16:07:00","problem_types":["CWE-79"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":6.1,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.8,"impactScore":2.7},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":4.3},"severity":"MEDIUM","exploitabilityScore":8.6,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:trane:tracer_sc_firmware:*:*:*:*:*:*:*:*","versionEndIncluding":"3.8","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:trane:tracer_sc:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"42534","Ordinal":"219019","Title":"CVE-2021-42534","CVE":"CVE-2021-42534","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"42534","Ordinal":"1","NoteData":"The affected product’s web application does not properly neutralize the input during webpage generation, which could allow an attacker to inject code in the input forms.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"42534","Ordinal":"2","NoteData":"2021-10-22","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"42534","Ordinal":"3","NoteData":"2021-10-25","Type":"Other","Title":"Modified"}]}}}