{"api_version":"1","generated_at":"2026-04-18T00:45:13+00:00","cve":"CVE-2026-40434","urls":{"html":"https://cve.report/CVE-2026-40434","api":"https://cve.report/api/cve/CVE-2026-40434.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-40434","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-40434"},"summary":{"title":"Anviz CrossChex Standard Improper Verification of Source of a Communication Channel","description":"Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP \npacket injection by an attacker on the same network to alter or disrupt \napplication traffic.","state":"PUBLISHED","assigner":"icscert","published_at":"2026-04-17 20:16:36","updated_at":"2026-04-17 20:16:36"},"problem_types":["CWE-940","CWE-940 CWE-940"],"metrics":[{"version":"3.1","source":"ics-cert@hq.dhs.gov","type":"Secondary","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","data":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03","name":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03","refsource":"ics-cert@hq.dhs.gov","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json","name":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json","refsource":"ics-cert@hq.dhs.gov","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.anviz.com/contact-us.html","name":"https://www.anviz.com/contact-us.html","refsource":"ics-cert@hq.dhs.gov","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-40434","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40434","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Anviz","product":"Anviz CrossChex Standard","version":"affected All versions","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"Anviz did not respond to CISA's attempts to coordinate these \nvulnerabilities. Users should contact Anviz for more information at \nhttps://www.anviz.com/contact-us.html.","time":"","lang":"en"}],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Anviz CrossChex Standard","vendor":"Anviz","versions":[{"status":"affected","version":"All versions"}]}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP \npacket injection by an attacker on the same network to alter or disrupt \napplication traffic."}],"value":"Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP \npacket injection by an attacker on the same network to alter or disrupt \napplication traffic."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-940","description":"CWE-940","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-04-17T19:49:28.099Z","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","shortName":"icscert"},"references":[{"url":"https://www.anviz.com/contact-us.html"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json"}],"source":{"advisory":"ICSA-26-106-03","discovery":"EXTERNAL"},"title":"Anviz CrossChex Standard Improper Verification of Source of a Communication Channel","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Anviz did not respond to CISA's attempts to coordinate these \nvulnerabilities. Users should contact Anviz for more information at \nhttps://www.anviz.com/contact-us.html."}],"value":"Anviz did not respond to CISA's attempts to coordinate these \nvulnerabilities. Users should contact Anviz for more information at \nhttps://www.anviz.com/contact-us.html."}],"x_generator":{"engine":"Vulnogram 1.0.1"}}},"cveMetadata":{"assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","assignerShortName":"icscert","cveId":"CVE-2026-40434","datePublished":"2026-04-17T19:49:28.099Z","dateReserved":"2026-04-14T15:42:14.096Z","dateUpdated":"2026-04-17T19:49:28.099Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-17 20:16:36","lastModifiedDate":"2026-04-17 20:16:36","problem_types":["CWE-940","CWE-940 CWE-940"],"metrics":{"cvssMetricV31":[{"source":"ics-cert@hq.dhs.gov","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"40434","Ordinal":"1","Title":"Anviz CrossChex Standard Improper Verification of Source of a Co","CVE":"CVE-2026-40434","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"40434","Ordinal":"1","NoteData":"Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP \npacket injection by an attacker on the same network to alter or disrupt \napplication traffic.","Type":"Description","Title":"Anviz CrossChex Standard Improper Verification of Source of a Co"}]}}}