{"id":"CVE-2026-71187","title":"Ebyte NA111-M Use of Client-Side Authentication","summary":"The Ebyte device relies on client side authentication logic that can be \nreproduced by unauthenticated users. An attacker may generate valid \nauthentication requests and bypass authentication to obtain \nadministrative access to the device.","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-603"],"vendor":"Ebyte","product":"Ebyte NA111-M Firmware","affected":["na111-m_firmware 9013-2-17"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-08-28T13:50:55.793042Z"},"published":"2026-08-27","updated":"2026-10-05","sourceUpdated":"2026-10-05T19:23:45.742Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-71187","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":0.00781,"epssPercentile":0.54426,"ingestedAt":"2026-10-05T20:32:56.661Z","slug":"CVE-2026-71187","body":"## Overview\n\nThe Ebyte device relies on client side authentication logic that can be \nreproduced by unauthenticated users. An attacker may generate valid \nauthentication requests and bypass authentication to obtain \nadministrative access to the device.\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":"midnight","depthScore":54,"depthScoreParts":{"impact":53.9,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}