CVE-2026-40851

Full vulnerability record from the local CVENow database.
Description

A local attacker can perform a confusion attack on the cfgparser via a specially crafted file on an USB stick leading to code execution. This can result in a total loss of confidentiality, integrity and availability.
Severity
HIGH
CVSS score
8.4 (v3.1)
Vulnerability status
Deferred
Source identifier
[email protected]
Published
2026-05-27 09:16:31.687000
Last modified
2026-10-26 11:10:00.157000
View original CVE JSON
{
  "id": "CVE-2026-40851",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-27T09:16:31.687",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A local attacker can perform a confusion attack on the cfgparser via a specially crafted file on an USB stick leading to code execution. This can result in a total loss of confidentiality, integrity and availability."
    },
    {
      "lang": "es",
      "value": "Un atacante local puede realizar un ataque de confusión en el cfgparser a través de un archivo especialmente diseñado en una memoria USB, lo que lleva a la ejecución de código. Esto puede resultar en una pérdida total de confidencialidad, integridad y disponibilidad."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "MB connect line",
          "product": "mbNET/mbNET.rokey",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.0.0",
              "lessThanOrEqual": "8.4.4",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "MB connect line",
          "product": "mbNET.mini",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.0.0",
              "lessThanOrEqual": "3.0.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "MB connect line",
          "product": "mbNET/mbNET.rokey",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8.4.4",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "MB connect line",
          "product": "mbNET.mini",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3.0.2",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Helmholz",
          "product": "REX200/250",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.0.0",
              "lessThanOrEqual": "8.4.4",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Helmholz",
          "product": "REX100",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0.0.0",
              "lessThanOrEqual": "3.0.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Helmholz",
          "product": "REX200/250",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "8.4.4",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Helmholz",
          "product": "REX100",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3.0.2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.4,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-27T11:44:44.253548Z",
          "id": "CVE-2026-40851",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-1287"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://www.certvde.com/en/advisories/VDE-2026-054/",
      "source": "[email protected]"
    }
  ]
}