{"id":"CVE-2026-82928","state":"PUBLISHED","title":"Undocumented access path in mH-DEVELOPER","description":"mH-DEVELOPER smart home module contains a hardcoded SSH public key in /root/.ssh/authorized_keys, serving as a potential backdoor. The SSH daemon allows root login via key authentication and starts automatically. An attacker with the matching private key can gain a root shell on any affected device, resulting in full system compromise. The key cannot be removed without remounting the file system and survives a factory reset. Vendor notes that this functionality was used only for service purposes.\n\n\nThis issue was fixed in version 3.0.30","publishedAt":"2026-09-28T12:11:40.726Z","updatedAt":"2026-09-28T16:32:28.919Z","severity":{"score":7.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["F&F Filipowski mH-DEVELOPER"],"affected":[{"vendor":"F&F Filipowski","product":"mH-DEVELOPER","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.30","versionType":"semver"}],"programFiles":["/root/.ssh/authorized_keys"]}],"references":["https://cert.pl/posts/2026/09/CVE-2026-82928/","https://www.fif.com.pl/pl/strona-glowna/1367-mh-developer.html"],"weaknesses":["CWE-1242"],"ingestedAt":"2026-10-29T20:13:15.269Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/82xxx/CVE-2026-82928.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-82928","state":"PUBLISHED","datePublished":"2026-09-28T12:11:40.726Z","dateUpdated":"2026-09-28T16:32:28.919Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2026-08-31T12:23:36.734Z"},"containers":{"cna":{"title":"Undocumented access path in mH-DEVELOPER","descriptions":[{"lang":"en","value":"mH-DEVELOPER smart home module contains a hardcoded SSH public key in /root/.ssh/authorized_keys, serving as a potential backdoor. The SSH daemon allows root login via key authentication and starts automatically. An attacker with the matching private key can gain a root shell on any affected device, resulting in full system compromise. The key cannot be removed without remounting the file system and survives a factory reset. Vendor notes that this functionality was used only for service purposes.\n\n\nThis issue was fixed in version 3.0.30"}],"affected":[{"vendor":"F&F Filipowski","product":"mH-DEVELOPER","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"3.0.30","versionType":"semver"}],"programFiles":["/root/.ssh/authorized_keys"]}],"references":[{"url":"https://cert.pl/posts/2026/09/CVE-2026-82928/","tags":["third-party-advisory"]},{"url":"https://www.fif.com.pl/pl/strona-glowna/1367-mh-developer.html","tags":["product"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"ADJACENT","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","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":7.7,"vectorString":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1242","lang":"en","description":"CWE-1242 Inclusion of Undocumented Features or Chicken Bits","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-09-28T12:11:40.726Z"},"cpeApplicability":[{"operator":"OR","nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:f_f_filipowski:mh-developer:*:*:*:*:*:*:*:*","versionStartIncluding":"0","versionEndExcluding":"3.0.30"}]}]}],"credits":[{"lang":"en","value":"Krzysztof Chudzik (CERT.PL)","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-82928","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-28T15:49:18.975247Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-28T16:32:28.919Z"}}]}}}