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CVE-2020-27261

Status: ModifiedHigh (8.8)—

The Omron CX-One Version 4.60 and prior is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (4)

Omron — Cx-oneOmron — Cx-positionOmron — Cx-protocolOmron — Cx-server

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2020-27261",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 8.8,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 2.8
      }
    ]
  },
  "affected": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "Omron",
          "product": "CX-One",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "4.60"
            }
          ]
        },
        {
          "vendor": "Omron",
          "product": "CX-Protocol",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2.02"
            }
          ]
        },
        {
          "vendor": "Omron",
          "product": "CX-Server",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "5.0.28"
            }
          ]
        },
        {
          "vendor": "Omron",
          "product": "CX-Position",
          "versions": [
            {
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom",
              "lessThanOrEqual": "2.52"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-02-09T15:15:13.157",
  "references": [
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-007-02",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-183/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-185/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://us-cert.cisa.gov/ics/advisories/icsa-21-007-02",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-183/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-21-185/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "ics-cert@hq.dhs.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Omron CX-One Version 4.60 and prior is vulnerable to a stack-based buffer overflow, which may allow an attacker to remotely execute arbitrary code."
    },
    {
      "lang": "es",
      "value": "El Omron CX-One versiones 4.60 y anteriores es vulnerable a un desbordamiento del búfer en la región stack de la memoria, lo que puede permitir a un atacante ejecutar código arbitrario remotamente"
    }
  ],
  "lastModified": "2026-06-17T03:09:04.510",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:omron:cx-one:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8DDFA8C8-5BB3-4A0A-BFA8-0963C46B6DD2",
              "versionEndIncluding": "4.60"
            },
            {
              "criteria": "cpe:2.3:a:omron:cx-position:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5A75973B-C2B1-4CFC-A2A9-BFB553037BF2",
              "versionEndIncluding": "2.52"
            },
            {
              "criteria": "cpe:2.3:a:omron:cx-protocol:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5E61B773-2097-4C4E-B48C-CFC7294A4C5A",
              "versionEndIncluding": "2.02"
            },
            {
              "criteria": "cpe:2.3:a:omron:cx-server:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "9DD31345-F164-4016-902E-DA9AD29430E4",
              "versionEndIncluding": "5.0.28"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}