{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80154", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-25T20:43:54.262Z", "datePublished": "2026-09-22T15:22:33.748Z", "dateUpdated": "2026-09-22T17:44:14.925Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-09-22T15:22:33.748Z"}, "title": "Lantronix Autonomous Out-of-Band Devices Predictable Session Token with Validation Bypass", "descriptions": [{"lang": "en", "value": "All firmware versions of Lantronix SLC8000, EMG8500, EMG7500, SLB882, SLCx-03, and SLCx-02 contain an authentication bypass vulnerability in the web management portal that allows unauthenticated attackers to derive valid session tokens of logged-in users and bypass source IP and User-Agent validation. Session tokens are generated deterministically from the device model and the current time at one-second resolution, resulting in a small enumerable set of possible active tokens. Attackers can construct a crafted URI that exploits file extension handling in the web server path routing to bypass per-session source-address validation, then use a derived token from a different source address to gain elevated privileges on the affected device and potentially impact downstream serial-attached devices."}], "datePublic": "2026-09-18T00:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-330", "description": "Use of Insufficiently Random Values", "type": "CWE"}]}], "affected": [{"defaultStatus": "unknown", "vendor": "LANTRONIX", "product": "SLC8000", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}, {"defaultStatus": "unknown", "vendor": "LANTRONIX", "product": "EMG8500", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}, {"defaultStatus": "unknown", "vendor": "LANTRONIX", "product": "EMG7500", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}, {"defaultStatus": "unknown", "vendor": "LANTRONIX", "product": "SLB882", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}, {"defaultStatus": "unknown", "vendor": "LANTRONIX", "product": "SLCx-03", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "vendor": "LANTRONIX", "product": "SLCx-02", "versions": [{"status": "affected", "version": "*", "versionType": "custom"}]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "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": 8.9, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H"}}, {"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "version": "3.1", "baseSeverity": "CRITICAL", "baseScore": 9.6, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"}}], "references": [{"url": "https://revrb.net/2026/09/21/revrb-lantern.html", "name": "Researcher Disclosure", "tags": ["technical-description"]}, {"url": "https://www.vulncheck.com/advisories/lantronix-autonomous-out-of-band-devices-predictable-session-token-with-validation-bypass", "tags": ["third-party-advisory"]}], "credits": [{"lang": "en", "value": "RE/VRb", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "vulncheck"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-09-22T17:22:31.916185Z", "id": "CVE-2026-80154", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-22T17:44:14.925Z"}}]}}