{"id":"CVE-2026-76940","title":"Ebyte NA111-M Improper Restriction of Excessive Authentication Attempts","summary":"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 o…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","cvssSource":"cna","cwe":["CWE-307"],"vendor":"Ebyte","product":"Ebyte NA111-M Firmware","affected":["na111-m_firmware 9013-2-17"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-08-28T13:49:55.550166Z"},"published":"2026-08-27","updated":"2026-10-05","sourceUpdated":"2026-10-05T19:21:57.713Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-76940","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"}],"tags":["cve.org"],"epss":0.00504,"epssPercentile":0.4094,"ingestedAt":"2026-10-05T20:32:56.663Z","slug":"CVE-2026-76940","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `na111-m_firmware 9013-2-17`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n### Workarounds\n\nEbyte 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.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}