CVE-2020-15786 (GCVE-0-2020-15786)

Vulnerability from cvelistv5 – Published: 2020-09-09 18:11 – Updated: 2026-06-02 19:01
VLAI
Summary
A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions < V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions <= V16), SIMATIC HMI Mobile Panels (All versions <= V16), SIMATIC HMI Unified Comfort Panels (All versions <= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-02 19:01 UTC
CWE
  • CWE-307 - Improper Restriction of Excessive Authentication Attempts
References
Show details on NVD website

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                          "product_name": "SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants)",
                          "version": {
                            "version_data": [
                              {
                                "version_value": "All versions \u003c V16"
                              }
                            ]
                          }
                        },
                        {
                          "product_name": "SIMATIC HMI Comfort Panels (incl. SIPLUS variants)",
                          "version": {
                            "version_data": [
                              {
                                "version_value": "All versions \u003c= V16"
                              }
                            ]
                          }
                        },
                        {
                          "product_name": "SIMATIC HMI Mobile Panels",
                          "version": {
                            "version_data": [
                              {
                                "version_value": "All versions \u003c= V16"
                              }
                            ]
                          }
                        },
                        {
                          "product_name": "SIMATIC HMI Unified Comfort Panels",
                          "version": {
                            "version_data": [
                              {
                                "version_value": "All versions \u003c= V16"
                              }
                            ]
                          }
                        }
                      ]
                    },
                    "vendor_name": "Siemens"
                  }
                ]
              }
            },
            "data_format": "MITRE",
            "data_type": "CVE",
            "data_version": "4.0",
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "A vulnerability has been identified in SIMATIC HMI Basic Panels 2nd Generation (incl. SIPLUS variants) (All versions \u003c V16), SIMATIC HMI Comfort Panels (incl. SIPLUS variants) (All versions \u003c= V16), SIMATIC HMI Mobile Panels (All versions \u003c= V16), SIMATIC HMI Unified Comfort Panels (All versions \u003c= V16). Affected devices insufficiently block excessive authentication attempts. This could allow a remote attacker to discover user passwords and obtain access to the Sm@rt Server via a brute-force attack."
                }
              ]
            },
            "problemtype": {
              "problemtype_data": [
                {
                  "description": [
                    {
                      "lang": "eng",
                      "value": "CWE-307: Improper Restriction of Excessive Authentication Attempts"
                    }
                  ]
                }
              ]
            },
            "references": {
              "reference_data": [
                {
                  "name": "https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf",
                  "refsource": "MISC",
                  "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-542525.pdf"
                }
              ]
            }
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "cec7a2ec-15b4-4faf-bd53-b40f371f3a77",
        "assignerShortName": "siemens",
        "cveId": "CVE-2020-15786",
        "datePublished": "2020-09-09T18:11:39.000Z",
        "dateReserved": "2020-07-15T00:00:00.000Z",
        "dateUpdated": "2026-06-02T19:01:42.007Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.


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