« Back to list

CVE-2020-7584

Status: ModifiedHigh (7.5)—

A vulnerability has been identified in SIMATIC S7-200 SMART CPU family (All versions >= V2.2 < V2.5.1). Affected devices do not properly handle large numbers of new incomming connections and could crash under certain circumstances. An attacker may leverage this to cause a Denial-of-Service situation.

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 (2)

Siemens — Simatic S7-200 Smart SR CPU FirmwareSiemens — Simatic S7-200 Smart ST CPU Firmware

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2020-7584",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "productcert@siemens.com",
      "affectedData": [
        {
          "vendor": "Siemens AG",
          "product": "SIMATIC S7-200 SMART CPU family",
          "versions": [
            {
              "status": "affected",
              "version": "All versions >= V2.2 < V2.5.1"
            }
          ]
        }
      ]
    }
  ],
  "published": "2020-07-14T14:15:18.650",
  "references": [
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-589181.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "productcert@siemens.com"
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-589181.pdf",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "productcert@siemens.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability has been identified in SIMATIC S7-200 SMART CPU family (All versions >= V2.2 < V2.5.1). Affected devices do not properly handle large numbers of new incomming connections and could crash under certain circumstances. An attacker may leverage this to cause a Denial-of-Service situation."
    },
    {
      "lang": "es",
      "value": "Se ha identificado una vulnerabilidad en la familia de CPU SIMATIC S7-200 SMART (Todas las versiones posteriores e incluyendo a V2.2 anteriores a V2.5.1). Los dispositivos afectados no manejan apropiadamente un gran número de nuevas conexiones entrantes y podrían bloquearse bajo determinadas circunstancias. Un atacante puede aprovechar esto para causar una situación de Denegación de Servicio"
    }
  ],
  "lastModified": "2026-06-17T03:25:03.850",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:simatic_s7-200_smart_sr_cpu_firmware:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "4FE8A428-3F0B-4A1C-BE47-2C1E82C47923",
              "versionEndExcluding": "2.5.1",
              "versionStartIncluding": "2.2"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:simatic_s7-200_smart_sr_cpu:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "CD87FA1B-10BF-4712-B229-A9AE3A9DECEC"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    },
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:siemens:simatic_s7-200_smart_st_cpu_firmware:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "CCB78749-4917-4060-8403-685790A1F12C",
              "versionEndExcluding": "2.5.1",
              "versionStartIncluding": "2.2"
            }
          ],
          "operator": "OR"
        },
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:h:siemens:simatic_s7-200_smart_st_cpu:-:*:*:*:*:*:*:*",
              "vulnerable": false,
              "matchCriteriaId": "0E97C885-E63F-4979-AD91-30A7B4F88AC8"
            }
          ],
          "operator": "OR"
        }
      ],
      "operator": "AND"
    }
  ],
  "sourceIdentifier": "productcert@siemens.com"
}