{"id":"CVE-2026-77056","state":"PUBLISHED","title":"Use of Default Credentials in boneIO","description":"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.\n\nThis 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.","publishedAt":"2026-10-26T14:45:53.279Z","updatedAt":"2026-10-26T16:46:44.867Z","severity":{"score":7.1,"label":"High","version":"4.0","vector":"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","source":"CERT-PL"},"assigner":"CERT-PL","products":["boneIO black_debian_images"],"affected":[{"vendor":"boneIO","product":"black_debian_images","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1.6.0","versionType":"semver"}],"repo":"https://github.com/boneIO-eu/black_debian_images"}],"references":["https://cert.pl/en/posts/2026/10/CVE-2026-77052","https://boneio.eu/en/docs/black"],"weaknesses":["CWE-1392"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/77xxx/CVE-2026-77056.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77056","state":"PUBLISHED","datePublished":"2026-10-26T14:45:53.279Z","dateUpdated":"2026-10-26T16:46:44.867Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-08-20T09:37:37.787Z"},"containers":{"cna":{"title":"Use of Default Credentials in boneIO","descriptions":[{"lang":"en","value":"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.\n\nThis 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."}],"affected":[{"vendor":"boneIO","product":"black_debian_images","defaultStatus":"unaffected","versions":[{"version":"1.2.0","status":"affected","lessThan":"1.6.0","versionType":"semver"}],"repo":"https://github.com/boneIO-eu/black_debian_images"}],"references":[{"url":"https://cert.pl/en/posts/2026/10/CVE-2026-77052","tags":["third-party-advisory"]},{"url":"https://boneio.eu/en/docs/black","tags":["product"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"HIGH","baseScore":7.1,"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1392","lang":"en","description":"CWE-1392 Use of Default Credentials","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-10-26T14:45:53.279Z"},"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:boneio:black_debian_images:*:*:*:*:*:*:*:*","versionStartIncluding":"1.2.0","versionEndExcluding":"1.6.0"}]}]}],"tags":["x_open-source"],"credits":[{"lang":"en","value":"Mateusz Włodarczak (s3ga)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"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":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-26T16:46:44.867Z"}}]}}}