{"id":"CVE-2026-55732","state":"PUBLISHED","title":"Loytec LINX firmware: Out-of-bounds Read in BACnet packet parsing (bacdt_datetime_to_tod)","description":"Out-of-bounds Read (CWE-125) in BACnet packet parsing (`bacdt_datetime_to_tod`) in Loytec LIP-ME201C, L-INX, L-GATE, L-ROC, L-IOB, L-DALI, L-VIS and L-PAD through 8.4.18 on LINX-A64 allows an unauthenticated remote attacker to crash `linx_a64.exe` and ultimately reboot the device via a malformed BACnet TimeSynchronization or UTC-TimeSynchronization packet with an invalid month value. 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The same vulnerability affects multiple other Loytec products."}],"affected":[{"vendor":"Loytec","product":"LIP-ME20xC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-INX","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-GATE","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-ROC","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-IOB","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-DALI","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-VIS","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]},{"vendor":"Loytec","product":"L-PAD","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"8.4.18","versionType":"custom"}]}],"references":[{"url":"https://www.loytec.com/support/product-security/advisories/8532-dibt-cve-20260608-0001-bacnet-crash-due-to-invalid-timesync-message-high","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":"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":8.7,"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-125","lang":"en","description":"CWE-125 Out-of-bounds read","type":"CWE"}]}],"providerMetadata":{"shortName":"NCSC.ch","orgId":"455daabc-a392-441d-aa46-37d35189897c","dateUpdated":"2026-07-24T14:00:48.771Z"},"impacts":[{"capecId":"CAPEC-540","descriptions":[{"lang":"en","value":"CAPEC-540 Overread Buffers"}]}],"solutions":[{"lang":"en","value":"Upgrade to firmware version 8.4.20.","supportingMedia":[{"type":"text/html","base64":false,"value":"Upgrade to firmware version 8.4.20."}]}],"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":{"timestamp":"2026-07-24T14:53:38.766440Z","id":"CVE-2026-55732","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-24T14:53:49.184Z"}}]}}}