{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55731","assignerOrgId":"455daabc-a392-441d-aa46-37d35189897c","state":"PUBLISHED","assignerShortName":"NCSC.ch","dateReserved":"2026-06-17T09:48:05.268Z","datePublished":"2026-07-24T14:00:30.497Z","dateUpdated":"2026-07-24T14:54:34.007Z"},"containers":{"cna":{"providerMetadata":{"orgId":"455daabc-a392-441d-aa46-37d35189897c","shortName":"NCSC.ch","dateUpdated":"2026-07-24T14:00:30.497Z"},"title":"Loytec LINX firmware: Unchecked input for loop condition in the SNMP agent","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-606","description":"CWE-606 Unchecked input for loop condition","type":"CWE"}]}],"affected":[{"vendor":"Loytec","product":"LIP-ME20xC","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-INX","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-GATE","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-ROC","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-IOB","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-DALI","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-VIS","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"},{"vendor":"Loytec","product":"L-PAD","versions":[{"status":"affected","version":"0","lessThanOrEqual":"8.4.16","versionType":"custom"}],"defaultStatus":"unaffected"}],"descriptions":[{"lang":"en","value":"Unchecked input for loop condition (CWE-606) in the SNMP agent in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an unauthenticated remote attacker to cause persistent denial of service (CPU exhaustion) via a crafted SNMP GETNEXT request with a large OID component.","supportingMedia":[{"type":"text/html","base64":false,"value":"Unchecked input for loop condition (CWE-606) in the SNMP agent in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.16 on LINX-A64 allows an unauthenticated remote attacker to cause persistent denial of service (CPU exhaustion) via a crafted SNMP GETNEXT request with a large OID component."}]}],"references":[{"url":"https://www.loytec.com/support/product-security/advisories/8531-dibt-cve-20260601-0003-unchecked-input-for-loop-condition-cwe-606-in-the-snmp-agent-medium","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","subIntegrityImpact":"NONE","vulnAvailabilityImpact":"HIGH","subAvailabilityImpact":"NONE","exploitMaturity":"UNREPORTED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","version":"4.0","baseSeverity":"MEDIUM","baseScore":6.6,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U"}}],"solutions":[{"lang":"en","value":"Upgrade to firmware version 8.4.18.","supportingMedia":[{"type":"text/html","base64":false,"value":"Upgrade to firmware version 8.4.18."}]}],"credits":[{"lang":"en","value":"Daniel Hulliger, armasuisse CYD Campus","type":"finder"},{"lang":"en","value":"Damian Pfammatter, armasuisse CYD Campus","type":"finder"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 1.0.2"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-24T14:54:22.819899Z","id":"CVE-2026-55731","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-24T14:54:34.007Z"}}]}}