{"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)\u00a0in the SNMP agent in Loytec LIP-ME201C,\u00a0L-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"}}]}}

{"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)\u00a0in the SNMP agent in Loytec LIP-ME201C,\u00a0L-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": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-55731", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "yes"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-24T14:54:22.819899Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-24T14:54:26.562Z"}}]}}

{}

{}

{}