{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-12504","assignerOrgId":"455daabc-a392-441d-aa46-37d35189897c","state":"PUBLISHED","assignerShortName":"NCSC.ch","dateReserved":"2026-06-17T09:48:17.638Z","datePublished":"2026-07-24T13:58:16.232Z","dateUpdated":"2026-07-24T14:57:20.563Z"},"containers":{"cna":{"providerMetadata":{"orgId":"455daabc-a392-441d-aa46-37d35189897c","shortName":"NCSC.ch","dateUpdated":"2026-07-24T13:58:16.232Z"},"title":"Loytec LINX firmware: Improper Authentication in PAM configuration","problemTypes":[{"descriptions":[{"lang":"en","cweId":"CWE-287","description":"CWE-287 Improper authentication","type":"CWE"}]},{"descriptions":[{"lang":"en","cweId":"CWE-521","description":"CWE-521 Weak password requirements","type":"CWE"}]}],"impacts":[{"capecId":"CAPEC-115","descriptions":[{"lang":"en","value":"CAPEC-115 Authentication Bypass"}]},{"capecId":"CAPEC-122","descriptions":[{"lang":"en","value":"CAPEC-122 Privilege Abuse"}]}],"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":"Improper Authentication (CWE-287) in the PAM configuration 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 a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field.","supportingMedia":[{"type":"text/html","base64":false,"value":"Improper Authentication (CWE-287) in the PAM configuration 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 a local attacker to authenticate as a uid=0 account without a password and obtain a root shell via an `/etc/passwd` entry with an empty password field."}]}],"references":[{"url":"https://www.loytec.com/support/product-security/advisories/8521-dibt-cve-20260526-0003-pam-passwordless-uid-0-authentication-high","tags":["vendor-advisory"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}],"cvssV4_0":{"attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","subConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","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":8.4,"vectorString":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"}}],"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":"2026-07-24T14:57:10.832151Z","id":"CVE-2026-12504","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":"2026-07-24T14:57:20.563Z"}}]}}