{"id":"CVE-2026-76940","state":"PUBLISHED","title":"Ebyte NA111-M Improper Restriction of Excessive Authentication Attempts","description":"The affected Ebyte device does not restrict repeated authentication \nattempts through rate limiting or account lockout mechanisms. This could\n allow an attacker to perform automated authentication attacks against \ndeployments that rely on password based authentication.","publishedAt":"2026-08-27T21:28:01.127Z","updatedAt":"2026-10-05T19:21:57.713Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","source":"icscert"},"assigner":"icscert","products":["Ebyte Ebyte NA111-M Firmware"],"affected":[{"vendor":"Ebyte","product":"Ebyte NA111-M Firmware","defaultStatus":"unaffected","versions":[{"version":"9013-2-17","status":"affected"}]}],"references":["https://www.cisa.gov/news-events/ics-advisories/icsa-26-237-06","https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-237-06.json"],"weaknesses":["CWE-307"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/76xxx/CVE-2026-76940.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-76940","state":"PUBLISHED","datePublished":"2026-08-27T21:28:01.127Z","dateUpdated":"2026-10-05T19:21:57.713Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2026-08-20T15:03:17.031Z"},"containers":{"cna":{"title":"Ebyte NA111-M Improper Restriction of Excessive Authentication Attempts","descriptions":[{"lang":"en","value":"The affected Ebyte device does not restrict repeated authentication \nattempts through rate limiting or account lockout mechanisms. This could\n allow an attacker to perform automated authentication attacks against \ndeployments that rely on password based authentication."}],"affected":[{"vendor":"Ebyte","product":"Ebyte NA111-M Firmware","defaultStatus":"unaffected","versions":[{"version":"9013-2-17","status":"affected"}]}],"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"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"NONE","baseSeverity":"HIGH","baseScore":7.5,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","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":8.7,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-307","lang":"en","description":"CWE-307","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2026-10-05T19:21:57.713Z"},"workarounds":[{"lang":"en","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.","supportingMedia":[{"type":"text/html","base64":false,"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."}]}],"credits":[{"lang":"en","value":"Jithin Nambiar J reported this vulnerability to CISA.","type":"finder"}],"source":{"advisory":"ICSA-26-237-06","discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.4"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-76940","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-08-28T13:49:55.550166Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-28T14:13:52.195Z"}}]}}}