Use of Default Credentials in boneIO

{
  "id": "3beb4d8c5fbb4ff986ecd10d95e461b34e56910fc47362661b8d41d7c9a304d5",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-77056",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Use of Default Credentials in boneIO",
    "summary": "boneIO black_debian_images ships with a Mosquitto MQTT broker that uses the same default credentials on all devices. These credentials are publicly documented on github, and there is no indication in the instructions to change them. A remote attacker can use them to gain full read and write access to the broker, allowing control of connected relays, blinds, and gates, and injection of fake entities into a linked Home Assistant installation. This issue was fixed in version 1.6.0 of the image: MQTT passwords are generated per device at first boot. Devices upgraded from earlier versions keep their existing broker credentials; from boneio 1.6.0 the web panel reports credentials that are still the published defaults, and the owner has to change them.",
    "evidence": "cve:CVE-2026-77056",
    "products": [
      {
        "name": {
          "value": "black_debian_images",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-77056",
      "aliases": [
        "CVE-2026-77056"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV4_0": {
            "Safety": "NOT_DEFINED",
            "version": "4.0",
            "Recovery": "NOT_DEFINED",
            "baseScore": 7.1,
            "Automatable": "NOT_DEFINED",
            "attackVector": "ADJACENT",
            "baseSeverity": "HIGH",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
            "exploitMaturity": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "privilegesRequired": "NONE",
            "subIntegrityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "vulnAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "repo": "https://github.com/boneIO-eu/black_debian_images",
          "vendor": "boneIO",
          "product": "black_debian_images",
          "versions": [
            {
              "status": "affected",
              "version": "1.2.0",
              "lessThan": "1.6.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-26T16:46:44.867Z",
      "provider": "cve",
      "references": [
        "https://cert.pl/en/posts/2026/10/CVE-2026-77052",
        "https://boneio.eu/en/docs/black"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-77056",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-10-26T16:25:44.166478Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-10-26T16:46:44.867Z"
            }
          }
        ],
        "cna": {
          "orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6",
          "shortName": "CERT-PL",
          "dateUpdated": "2026-10-26T14:45:53.279Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-77056",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 320619,
  "published_at": "2026-10-26T14:45:53.279+00:00"
}