Vulnerability-Lookup

FKIE_CVE-2021-36799

Vulnerability from fkie_nvd - Published: 2021-07-19 17:15 - Updated: 2026-06-17 03:59

Severity

8.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

References

URL	Tags
cve@mitre.org	http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html	Third Party Advisory, VDB Entry
cve@mitre.org	https://github.com/robertguetzkow/ets5-password-recovery	Third Party Advisory
cve@mitre.org	https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/	Product, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108	http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html	Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108	https://github.com/robertguetzkow/ets5-password-recovery	Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108	https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/	Product, Vendor Advisory

Impacted products

	Vendor	Product	Version
	knx	engineering_tool_software_5	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:knx:engineering_tool_software_5:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5601DBE0-1467-4B6E-A5D3-1EC58E35E36B",
              "versionEndIncluding": "5.7.6",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [
    {
      "sourceIdentifier": "cve@mitre.org",
      "tags": [
        "unsupported-when-assigned"
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"
    },
    {
      "lang": "es",
      "value": "** NO SOPORTADO CUANDO SE ASIGN\u00d3  ** KNX ETS5 a trav\u00e9s de la 5.7.6 utiliza la contrase\u00f1a hard-coded ETS5Password, con un valor de sal de Ivan Medvedev, permitiendo a los usuarios locales leer la informaci\u00f3n del proyecto. NOTA: Esta vulnerabilidad s\u00f3lo afecta a los productos que ya no son soportados por el mantenedor"
    }
  ],
  "id": "CVE-2021-36799",
  "lastModified": "2026-06-17T03:59:27.303",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 2.1,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 8.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 6.0,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2021-07-19T17:15:11.920",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/robertguetzkow/ets5-password-recovery"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://github.com/robertguetzkow/ets5-password-recovery"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Product",
        "Vendor Advisory"
      ],
      "url": "https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-798"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2021-36799 (GCVE-0-2021-36799)

Vulnerability from cvelistv5 – Published: 2021-07-19 16:31 – Updated: 2024-08-04 01:01 Unsupported When Assigned

Summary

Severity

No CVSS data available.

CWE

Assigner

mitre mitre root

References

3 references

URL	Tags
https://github.com/robertguetzkow/ets5-password-r…	x_refsource_MISC
https://www.knx.org/knx-en/for-professionals/soft…	x_refsource_MISC
http://packetstormsecurity.com/files/165200/ETS5-…	x_refsource_MISC

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T01:01:59.381Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
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        },
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            ],
            "url": "https://github.com/robertguetzkow/ets5-password-recovery"
          },
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            ],
            "url": "https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/"
          },
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            "tags": [
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            ],
            "url": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
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              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "KNX ETS5 through 5.7.6 uses the hard-coded password ETS5Password, with a salt value of Ivan Medvedev, allowing local users to read project information. NOTE: This vulnerability only affects products that are no longer supported by the maintainer"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
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              "lang": "en",
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      "providerMetadata": {
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        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
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      },
      "references": [
        {
          "tags": [
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        },
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          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.knx.org/knx-en/for-professionals/software/ets-5-professional/"
        },
        {
          "tags": [
            "x_refsource_MISC"
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          "url": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html"
        }
      ],
      "tags": [
        "unsupported-when-assigned"
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      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-36799",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
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          }
        },
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        "description": {
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        "problemtype": {
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            },
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            },
            {
              "name": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html",
              "refsource": "MISC",
              "url": "http://packetstormsecurity.com/files/165200/ETS5-Password-Recovery-Tool.html"
            }
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  },
  "cveMetadata": {
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    "datePublished": "2021-07-19T16:31:25.000Z",
    "dateReserved": "2021-07-19T00:00:00.000Z",
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    "state": "PUBLISHED"
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}

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.