{"id":"CVE-2026-40434","aliases":["EUVD-2026-23533","GHSA-qg37-cwrh-945r"],"status":"published","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.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00231,"percentile":0.14024,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-940"],"published":"2026-04-17T19:49:28Z","modified":"2026-10-26T21:10:00Z","products":[{"vendor":"anviz","product":"anviz crosschex standard"},{"vendor":"anviz","product":"crosschex_standard"}],"references":[{"url":"https://www.anviz.com/contact-us.html","tags":["Product"]},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03","tags":["US Government Resource"]},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json","tags":["Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-40434"},{"url":"https://github.com/advisories/GHSA-qg37-cwrh-945r"}],"sources":{"cve":[{"id":"CVE-2026-40434","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.","status":"published","published":"2026-04-17T19:49:28.099Z","modified":"2026-04-17T20:28:02.785Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T13:43:11.445168Z"}],"euvd":[{"id":"EUVD-2026-23533","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.","status":"published","published":"2026-04-17T19:49:28Z","modified":"2026-04-17T20:28:02Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:24:23.330761Z"}],"ghsa":[{"id":"GHSA-qg37-cwrh-945r","title":"Anviz CrossChex Standard\nlacks source verification in the client/server channel, enabling TCP ...","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.","status":"published","published":"2026-04-17T21:31:47Z","modified":"2026-04-17T21:31:53Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T15:07:32.404178Z"}],"nvd":[{"id":"CVE-2026-40434","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.","status":"published","published":"2026-04-17T20:16:36.083Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-940"],"updated_at":"2026-11-02T14:12:15.120927Z"}]}}