{"id":"CVE-2026-39453","state":"PUBLISHED","title":"Red Lion Controls N-Tron 700 Series Reachable Assertion","description":"Navigating to a certain URL on the switch’s web server causes the switch to reboot. This can be automated using a tool like curl to create DoS conditions where the switch constantly reboots.","publishedAt":"2026-10-09T14:42:18.998Z","updatedAt":"2026-10-11T17:05:28.474Z","severity":{"score":8.5,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H","source":"icscert"},"assigner":"icscert","products":["Red Lion Controls 700 Series"],"affected":[{"vendor":"Red Lion Controls","product":"700 Series","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"Firmware Versions 3.11.0","versionType":"custom"},{"version":"0","status":"affected","lessThan":"Bootloader Versions 2.0.6.1","versionType":"custom"},{"version":"3.11.1","status":"unaffected"}]}],"references":["https://www.hms-networks.com/","https://www.hms-networks.com/cybersecurity","https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-01","https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-01.json"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:11:50.837Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/39xxx/CVE-2026-39453.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-39453","state":"PUBLISHED","datePublished":"2026-10-09T14:42:18.998Z","dateUpdated":"2026-10-11T17:05:28.474Z","assignerShortName":"icscert","assignerOrgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateReserved":"2026-04-08T19:28:49.591Z"},"containers":{"cna":{"title":"Red Lion Controls N-Tron 700 Series Reachable Assertion","descriptions":[{"lang":"en","value":"Navigating to a certain URL on the switch’s web server causes the switch to reboot. This can be automated using a tool like curl to create DoS conditions where the switch constantly reboots."}],"affected":[{"vendor":"Red Lion Controls","product":"700 Series","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"Firmware Versions 3.11.0","versionType":"custom"},{"version":"0","status":"affected","lessThan":"Bootloader Versions 2.0.6.1","versionType":"custom"},{"version":"3.11.1","status":"unaffected"}]}],"references":[{"url":"https://www.hms-networks.com/"},{"url":"https://www.hms-networks.com/cybersecurity"},{"url":"https://www.cisa.gov/news-events/ics-advisories/icsa-26-281-01"},{"url":"https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-281-01.json"}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseSeverity":"HIGH","baseScore":8.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H"}},{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","subConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","subIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"HIGH","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":8.5,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:H/SA:H"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","lang":"en","description":"CWE-617","type":"CWE"}]}],"providerMetadata":{"shortName":"icscert","orgId":"7d14cffa-0d7d-4270-9dc0-52cabd5a23a6","dateUpdated":"2026-10-09T14:42:18.998Z"},"solutions":[{"lang":"en","value":"Red Lion controls recommends the following upgrades for the N-Tron 700 Series: \n\n\n  *  Upgrade to firmware version 3.11.1 or greater\n  *  Configure or disable the SNMP communities\n  *  Disable access to the web GUI\n\n\n\n\n\nThe upgrade procedure document can be viewed  here https://www.hms-networks.com/ .\n\n\n\n\nThe advisory issued by HMS Networks regarding these vulnerabilities can be viewed  here https://www.hms-networks.com/cybersecurity .","supportingMedia":[{"type":"text/html","base64":false,"value":"<p>Red Lion controls recommends the following upgrades for the N-Tron 700 Series: <br></p><ul><li>Upgrade to firmware version 3.11.1 or greater</li><li>Configure or disable the SNMP communities</li><li>Disable access to the web GUI</li></ul>\n<p>The upgrade procedure document can be viewed <a href=\"https://www.hms-networks.com/\">here</a>.</p>\n<p>The advisory issued by HMS Networks regarding these vulnerabilities can be viewed <a href=\"https://www.hms-networks.com/cybersecurity\">here</a>.</p>"}]}],"credits":[{"lang":"en","value":"Gabrianna (Ria) Milloway of Idaho National Laboratory reported this vulnerability to CISA.","type":"finder"}],"source":{"advisory":"ICSA-26-281-01","discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.5"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-39453","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2026-10-11T16:49:22.992241Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-11T17:05:28.474Z"}}]}}}