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CVE-2021-20836

Estado: ModificadaMedia (6.5)—

Out-of-bounds read vulnerability in CX-Supervisor v4.0.0.13 and v4.0.0.16 allows an attacker with administrative privileges to cause information disclosure and/or arbitrary code execution by opening a specially crafted SCS project files.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Omron — Cx-supervisor

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-20836",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:S/C:P/I:P/A:P",
          "authentication": "SINGLE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.6
      }
    ]
  },
  "affected": [
    {
      "source": "vultures@jpcert.or.jp",
      "affectedData": [
        {
          "vendor": "OMRON Corporation",
          "product": "OMRON CX-Supervisor",
          "versions": [
            {
              "status": "affected",
              "version": "v4.0.0.13 and v4.0.0.16"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-10-19T03:15:06.887",
  "references": [
    {
      "url": "https://jvn.jp/en/vu/JVNVU90041391/index.html",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://www.myomron.com/index.php?action=kb&article=1692",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "vultures@jpcert.or.jp"
    },
    {
      "url": "https://jvn.jp/en/vu/JVNVU90041391/index.html",
      "tags": [
        "Release Notes",
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.myomron.com/index.php?action=kb&article=1692",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Out-of-bounds read vulnerability in CX-Supervisor v4.0.0.13 and v4.0.0.16 allows an attacker with administrative privileges to cause information disclosure and/or arbitrary code execution by opening a specially crafted SCS project files."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de lectura fuera de límites en CX-Supervisor versiones v4.0.0.13 y v4.0.0.16, permite a un atacante con privilegios administrativos causar una divulgación de información y/o la ejecución de código arbitrario al abrir un archivo de proyecto SCS especialmente diseñado"
    }
  ],
  "lastModified": "2026-06-17T03:34:30.987",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:omron:cx-supervisor:4.0.0.13:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "475F2663-8F90-4532-9C3F-3B37FDC96811"
            },
            {
              "criteria": "cpe:2.3:a:omron:cx-supervisor:4.0.0.16:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "482A7868-077A-4E8F-AB9A-D8864FC55C12"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "vultures@jpcert.or.jp"
}