{"api_version":"1","generated_at":"2026-08-28T03:52:33+00:00","cve":"CVE-2026-77977","urls":{"html":"https://cve.report/CVE-2026-77977","api":"https://cve.report/api/cve/CVE-2026-77977.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-77977","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77977"},"summary":{"title":"Ebyte NE2-D11 Missing Authentication for Critical Function","description":"Ebyte gateway product's vendor configuration utility does not require authentication before \nallowing certain disruptive administrative actions when default \ncredentials remain configured. An unauthenticated attacker on the \nadjacent network could reboot the device or restore factory settings, \nresulting in a loss of configuration and service availability.","state":"PUBLISHED","assigner":"icscert","published_at":"2026-08-28 00:18:15","updated_at":"2026-08-28 00:18:15"},"problem_types":["CWE-306","CWE-306 CWE-306"],"metrics":[{"version":"4.0","source":"ics-cert@hq.dhs.gov","type":"Secondary","score":"7.2","severity":"HIGH","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/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","data":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/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","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}},{"version":"4.0","source":"CNA","type":"CVSS","score":"7.2","severity":"HIGH","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","data":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"}},{"version":"3.1","source":"ics-cert@hq.dhs.gov","type":"Secondary","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"8.1","severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","data":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json","name":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json","refsource":"ics-cert@hq.dhs.gov","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06","name":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06","refsource":"ics-cert@hq.dhs.gov","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-77977","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77977","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Ebyte","product":"Ebyte NE2-D11 Firmware","version":"affected FW-9167-0-11","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[{"source":"CNA","title":"","value":"Ebyte acknowledged receipt of the reported vulnerabilities and indicated\n that a patch was under development. However, the vendor has not \nresponded to subsequent requests for coordination, and CISA has not been\n informed of the status or availability of the patch. Users are \nencouraged to reach out to Ebyte for more information.","time":"","lang":"en"}],"exploits":[],"credits":[{"source":"CNA","value":"Jithin Nambiar reported this vulnerability to CISA.","lang":"en"}],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Ebyte NE2-D11 Firmware","vendor":"Ebyte","versions":[{"status":"affected","version":"FW-9167-0-11"}]}],"credits":[{"lang":"en","type":"finder","value":"Jithin Nambiar reported this vulnerability to CISA."}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Ebyte gateway product's vendor configuration utility does not require authentication before \nallowing certain disruptive administrative actions when default \ncredentials remain configured. An unauthenticated attacker on the \nadjacent network could reboot the device or restore factory settings, \nresulting in a loss of configuration and service availability."}],"value":"Ebyte gateway product's vendor configuration utility does not require authentication before \nallowing certain disruptive administrative actions when default \ncredentials remain configured. An unauthenticated attacker on the \nadjacent network could reboot the device or restore factory settings, \nresulting in a loss of configuration and service availability."}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]},{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":7.2,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-306","description":"CWE-306","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-27T21:56:10.086Z","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","shortName":"icscert"},"references":[{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json"}],"source":{"advisory":"ICSA-26-237-06","discovery":"EXTERNAL"},"title":"Ebyte NE2-D11 Missing Authentication for Critical Function","workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Ebyte acknowledged receipt of the reported vulnerabilities and indicated\n that a patch was under development. However, the vendor has not \nresponded to subsequent requests for coordination, and CISA has not been\n informed of the status or availability of the patch. Users are \nencouraged to reach out to Ebyte for more information."}],"value":"Ebyte acknowledged receipt of the reported vulnerabilities and indicated\n that a patch was under development. However, the vendor has not \nresponded to subsequent requests for coordination, and CISA has not been\n informed of the status or availability of the patch. Users are \nencouraged to reach out to Ebyte for more information."}],"x_generator":{"engine":"Vulnogram 1.0.4"}}},"cveMetadata":{"assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","assignerShortName":"icscert","cveId":"CVE-2026-77977","datePublished":"2026-08-27T21:56:10.086Z","dateReserved":"2026-08-21T19:56:57.899Z","dateUpdated":"2026-08-27T21:56:10.086Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-28 00:18:15","lastModifiedDate":"2026-08-28 00:18:15","problem_types":["CWE-306","CWE-306 CWE-306"],"metrics":{"cvssMetricV40":[{"source":"ics-cert@hq.dhs.gov","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/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","baseScore":7.2,"baseSeverity":"HIGH","attackVector":"ADJACENT","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"cvssMetricV31":[{"source":"ics-cert@hq.dhs.gov","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","baseScore":8.1,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"77977","Ordinal":"1","Title":"Ebyte NE2-D11 Missing Authentication for Critical Function","CVE":"CVE-2026-77977","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"77977","Ordinal":"1","NoteData":"Ebyte gateway product's vendor configuration utility does not require authentication before \nallowing certain disruptive administrative actions when default \ncredentials remain configured. An unauthenticated attacker on the \nadjacent network could reboot the device or restore factory settings, \nresulting in a loss of configuration and service availability.","Type":"Description","Title":"Ebyte NE2-D11 Missing Authentication for Critical Function"}]}}}