{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-27842", "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "state": "PUBLISHED", "assignerShortName": "jpcert", "dateReserved": "2026-03-10T01:23:00.998Z", "datePublished": "2026-03-11T05:25:34.834Z", "dateUpdated": "2026-03-11T05:25:34.834Z"}, "containers": {"cna": {"affected": [{"vendor": "Micro Research Ltd.", "product": "MR-GM5L-S1", "versions": [{"version": "firmware versions prior to v2.01.04N1_02", "status": "affected"}]}, {"vendor": "Micro Research Ltd.", "product": "MR-GM5A-L1", "versions": [{"version": "firmware versions prior to v2.01.04N1_02", "status": "affected"}]}], "descriptions": [{"lang": "en", "value": "Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device configuration."}], "problemTypes": [{"descriptions": [{"description": "Authentication Bypass Using an Alternate Path or Channel", "lang": "en-US", "cweId": "CWE-288", "type": "CWE"}]}], "references": [{"url": "https://www.mrl.co.jp/download/security/JVNVU98103854.pdf"}, {"url": "https://jvn.jp/en/vu/JVNVU98103854/"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV3_0": {"version": "3.0", "baseSeverity": "CRITICAL", "baseScore": 9.8, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en-US", "value": "GENERAL"}], "cvssV4_0": {"version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9.3, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}], "providerMetadata": {"orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce", "shortName": "jpcert", "dateUpdated": "2026-03-11T05:25:34.834Z"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Authentication bypass issue exists in MR-GM5L-S1 and MR-GM5A-L1, which may allow an attacker to bypass authentication and change the device configuration."}], "id": "CVE-2026-27842", "lastModified": "2026-03-11T13:52:47.683", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "vultures@jpcert.or.jp", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 9.3, "baseSeverity": "CRITICAL", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "vultures@jpcert.or.jp", "type": "Secondary"}]}, "published": "2026-03-11T06:17:13.867", "references": [{"source": "vultures@jpcert.or.jp", "url": "https://jvn.jp/en/vu/JVNVU98103854/"}, {"source": "vultures@jpcert.or.jp", "url": "https://www.mrl.co.jp/download/security/JVNVU98103854.pdf"}], "sourceIdentifier": "vultures@jpcert.or.jp", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-288"}], "source": "vultures@jpcert.or.jp", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,v2.01.04N1_02)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "MR-GM5A-L1", "source": "cna", "vendor": "Micro Research Ltd."}, "product": "mr-gm5a-l1", "vendor": "micro_research"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,v2.01.04N1_02)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "manual", "scores": [{"score": 100.0, "source": "manual"}]}, "original": {"product": "MR-GM5L-S1", "source": "cna", "vendor": "Micro Research Ltd."}, "product": "mr-gm5l-s1", "vendor": "micro_research"}], "created": "2026-03-11T11:37:55.089881+00:00", "updated": "2026-03-11T11:37:55.090065+00:00", "vendors": ["micro_research", "micro_research$PRODUCT$mr-gm5a-l1", "micro_research$PRODUCT$mr-gm5l-s1"]}