{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82928", "assignerOrgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "state": "PUBLISHED", "assignerShortName": "CERT-PL", "dateReserved": "2026-08-31T12:23:36.734Z", "datePublished": "2026-09-28T12:11:40.726Z", "dateUpdated": "2026-09-28T12:11:40.726Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "4bb8329e-dd38-46c1-aafb-9bf32bcb93c6", "shortName": "CERT-PL", "dateUpdated": "2026-09-28T12:11:40.726Z"}, "title": "Undocumented access path in mH-DEVELOPER", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-1242", "description": "CWE-1242 Inclusion of Undocumented Features or Chicken Bits", "type": "CWE"}]}], "affected": [{"vendor": "F&F Filipowski", "product": "mH-DEVELOPER", "programFiles": ["/root/.ssh/authorized_keys"], "versions": [{"status": "affected", "version": "0", "lessThan": "3.0.30", "versionType": "semver"}], "defaultStatus": "unaffected"}], "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"}]}]}], "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\u00a03.0.30", "supportingMedia": [{"type": "text/html", "base64": false, "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.<div><br></div><div>This issue was fixed in version&nbsp;<span>3.0.30</span></div>"}]}], "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"}}], "credits": [{"lang": "en", "value": "Krzysztof Chudzik (CERT.PL)", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "x_generator": {"engine": "Vulnogram 0.2.0"}}}}

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