GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2021-34571 (GCVE-0-2021-34571)

Vulnerability from cvelistv5 – Published: 2021-09-16 12:20 – Updated: 2024-09-16 16:13
VLAI
Title
Hard-coded Credentials in Enbra Wireless M-Bus devices
Summary
Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.
CWE
  • CWE-798 - Use of Hard-coded Credentials
References
Impacted products
Vendor Product Version CPE status
Enbra AT-WMBUS-16-2 Unknown: all
guessed Create a notification for this product.
Enbra ER-AM DN 15 Unknown: ER-AM DN 15/SV all
Unknown: ER-AM DN 15/TV all
guessed Create a notification for this product.
Enbra EWM 1.7.29 Affected: 03.11.2019
guessed Create a notification for this product.
Date Public
2021-08-31 00:00
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T00:12:50.369Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "AT-WMBUS-16-2",
          "vendor": "Enbra",
          "versions": [
            {
              "status": "unknown",
              "version": "all"
            }
          ]
        },
        {
          "product": "ER-AM DN 15",
          "vendor": "Enbra",
          "versions": [
            {
              "status": "unknown",
              "version": "ER-AM DN 15/SV all"
            },
            {
              "status": "unknown",
              "version": "ER-AM DN 15/TV all"
            }
          ]
        },
        {
          "product": "EWM 1.7.29",
          "vendor": "Enbra",
          "versions": [
            {
              "status": "affected",
              "version": "03.11.2019"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Libor POL\u010c\u00c1K reported to CERT@VDE"
        }
      ],
      "datePublic": "2021-08-31T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-798",
              "description": "CWE-798 Use of Hard-coded Credentials",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-09-16T12:20:15.000Z",
        "orgId": "270ccfa6-a436-4e77-922e-914ec3a9685c",
        "shortName": "CERTVDE"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en"
        }
      ],
      "source": {
        "discovery": "EXTERNAL"
      },
      "title": "Hard-coded Credentials in Enbra Wireless M-Bus devices",
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "info@cert.vde.com",
          "DATE_PUBLIC": "2021-08-31T22:00:00.000Z",
          "ID": "CVE-2021-34571",
          "STATE": "PUBLIC",
          "TITLE": "Hard-coded Credentials in Enbra Wireless M-Bus devices"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "AT-WMBUS-16-2",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "?",
                            "version_value": "all"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "ER-AM DN 15",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "?",
                            "version_name": "ER-AM DN 15/SV",
                            "version_value": "all"
                          },
                          {
                            "version_affected": "?",
                            "version_name": "ER-AM DN 15/TV",
                            "version_value": "all"
                          }
                        ]
                      }
                    },
                    {
                      "product_name": "EWM 1.7.29",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "=",
                            "version_value": "03.11.2019"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Enbra"
              }
            ]
          }
        },
        "credit": [
          {
            "lang": "eng",
            "value": "Libor POL\u010c\u00c1K reported to CERT@VDE"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM."
            }
          ]
        },
        "generator": {
          "engine": "Vulnogram 0.0.9"
        },
        "impact": {
          "cvss": {
            "attackComplexity": "LOW",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 6.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "CWE-798 Use of Hard-coded Credentials"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en",
              "refsource": "CONFIRM",
              "url": "https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en"
            }
          ]
        },
        "source": {
          "discovery": "EXTERNAL"
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "270ccfa6-a436-4e77-922e-914ec3a9685c",
    "assignerShortName": "CERTVDE",
    "cveId": "CVE-2021-34571",
    "datePublished": "2021-09-16T12:20:15.225Z",
    "dateReserved": "2021-06-10T00:00:00.000Z",
    "dateUpdated": "2024-09-16T16:13:55.210Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-34571",
      "date": "2026-09-15",
      "epss": "0.00226",
      "percentile": "0.13437"
    },
    "fkie_nvd": {
      "configurations": "[{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:a:enbra:ewm:1.7.29:*:*:*:*:*:*:*\", \"matchCriteriaId\": \"C983990C-D1DE-42C2-B6A2-8D9BD0B5A4FF\"}]}]}]",
      "descriptions": "[{\"lang\": \"en\", \"value\": \"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.\"}, {\"lang\": \"es\", \"value\": \"M\\u00faltiples dispositivos M-Bus inal\\u00e1mbricos de Enbra, usan Credenciales Embebidas en Security mode 5 sin una opci\\u00f3n para cambiar la clave de cifrado. Un adversario puede aprender toda la informaci\\u00f3n disponible en Enbra EWM\"}]",
      "id": "CVE-2021-34571",
      "lastModified": "2024-11-21T06:10:43.520",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"info@cert.vde.com\", \"type\": \"Secondary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 6.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"ADJACENT_NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 3.6}, {\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\", \"baseScore\": 6.5, \"baseSeverity\": \"MEDIUM\", \"attackVector\": \"ADJACENT_NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"HIGH\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"exploitabilityScore\": 2.8, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:A/AC:M/Au:N/C:P/I:N/A:N\", \"baseScore\": 2.9, \"accessVector\": \"ADJACENT_NETWORK\", \"accessComplexity\": \"MEDIUM\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"PARTIAL\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"NONE\"}, \"baseSeverity\": \"LOW\", \"exploitabilityScore\": 5.5, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2021-09-16T13:15:14.200",
      "references": "[{\"url\": \"https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en\", \"source\": \"info@cert.vde.com\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\", \"tags\": [\"Third Party Advisory\"]}]",
      "sourceIdentifier": "info@cert.vde.com",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"info@cert.vde.com\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-798\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-34571\",\"sourceIdentifier\":\"info@cert.vde.com\",\"published\":\"2021-09-16T13:15:14.200\",\"lastModified\":\"2024-11-21T06:10:43.520\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"Multiple Wireless M-Bus devices by Enbra use Hard-coded Credentials in Security mode 5 without an option to change the encryption key. An adversary can learn all information that is available in Enbra EWM.\"},{\"lang\":\"es\",\"value\":\"M\u00faltiples dispositivos M-Bus inal\u00e1mbricos de Enbra, usan Credenciales Embebidas en Security mode 5 sin una opci\u00f3n para cambiar la clave de cifrado. Un adversario puede aprender toda la informaci\u00f3n disponible en Enbra EWM\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"info@cert.vde.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:M/Au:N/C:P/I:N/A:N\",\"baseScore\":2.9,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"MEDIUM\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"PARTIAL\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":5.5,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"info@cert.vde.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-798\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:enbra:ewm:1.7.29:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C983990C-D1DE-42C2-B6A2-8D9BD0B5A4FF\"}]}]}],\"references\":[{\"url\":\"https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en\",\"source\":\"info@cert.vde.com\",\"tags\":[\"Third Party Advisory\"]},{\"url\":\"https://www.fit.vutbr.cz/~polcak/CVE-2021-34571.en\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\"]}]}}",
    "redhat_vex": {
      "current_release_date": "2026-03-27T13:55:36+00:00",
      "cve": "CVE-2021-34571",
      "id": "CVE-2021-34571",
      "initial_release_date": "2021-08-31T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Hard-coded Credentials in Enbra Wireless M-Bus devices",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-34571.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…