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CVE-2016-8371

Status: ModifiedHigh (7.3)—

The web server in Phoenix Contact ILC PLCs can be accessed without authenticating even if the authentication mechanism is enabled.

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 (1)

Phoenixcontact — ILC Plcs Firmware

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2016-8371",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": true,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 7.3,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
        },
        "impactScore": 3.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "ics-cert@hq.dhs.gov",
      "affectedData": [
        {
          "vendor": "Phoenix Contact",
          "product": "Phoenix Contact ILC PLCs",
          "versions": [
            {
              "status": "affected",
              "version": "All ILC 1xx PLCs"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-04-05T16:29:00.283",
  "references": [
    {
      "url": "http://www.securityfocus.com/bid/94163",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-313-01",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "https://www.exploit-db.com/exploits/45590/",
      "source": "ics-cert@hq.dhs.gov"
    },
    {
      "url": "http://www.securityfocus.com/bid/94163",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://ics-cert.us-cert.gov/advisories/ICSA-313-01",
      "tags": [
        "Third Party Advisory",
        "US Government Resource"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.exploit-db.com/exploits/45590/",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "ics-cert@hq.dhs.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-592"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The web server in Phoenix Contact ILC PLCs can be accessed without authenticating even if the authentication mechanism is enabled."
    },
    {
      "lang": "es",
      "value": "El servidor web de los PLC Phoenix Contact ILC puede ser accedido sin autenticación incluso aunque el mecanismo de autenticación esté habilitado."
    }
  ],
  "lastModified": "2026-06-17T00:54:14.243",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:phoenixcontact:ilc_plcs_firmware:-:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D346044F-AA82-42FD-A882-C01280BD971D"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:phoenixcontact:ilc_plcs:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "28BCB419-3D9A-46AB-8B1F-8EBC67DE4E81"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "ics-cert@hq.dhs.gov"
}