CVE-2026-40434

{
  "id": "CVE-2026-40434",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-17T20:16:36.083",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "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."
    },
    {
      "lang": "es",
      "value": "Anviz CrossChex Standard carece de verificación de origen en el canal cliente/servidor, lo que permite la inyección de paquetes TCP por un atacante en la misma red para alterar o interrumpir el tráfico de la aplicación."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Anviz",
          "product": "Anviz CrossChex Standard",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "All versions",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "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
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-17T20:27:23.496359Z",
          "id": "CVE-2026-40434",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-940"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:anviz:crosschex_standard:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "155C659B-9DDA-46B7-9020-0D8741D19926"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-106-03.json",
      "source": "[email protected]",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.anviz.com/contact-us.html",
      "source": "[email protected]",
      "tags": [
        "Product"
      ]
    },
    {
      "url": "https://www.cisa.gov/news-events/ics-advisories/icsa-26-106-03",
      "source": "[email protected]",
      "tags": [
        "US Government Resource"
      ]
    }
  ]
}