{"id":"CVE-2025-11500","state":"PUBLISHED","title":"Credentials exposure in tinycontrol devices","description":"Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for interface management and one for protecting all other server resources. When the latter is turned off (which is a default setting), an unauthenticated attacker on the local network can obtain usernames and encoded passwords for interface management portal by inspecting the HTTP response of the server when visiting the login page, which contains a JSON file with these details. Both normal and admin users credentials are exposed. \nThis issue has been fixed in firmware versions: 1.36 (for tcPDU), 1.67 (for LK3.5 - hardware versions: 3.5, 3.6, 3.7 and 3.8), 1.75 (for LK3.9 - hardware version 3.9) and 1.38 (for LK4 - hardware version 4.0).","publishedAt":"2026-03-16T09:26:14.290Z","updatedAt":"2026-03-16T16:24:33.361Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","source":"CERT-PL"},"assigner":"CERT-PL","products":["tinycontrol Lan Kontroler v3.5","tinycontrol LK3.9","tinycontrol LK4","tinycontrol tcPDU"],"affected":[{"vendor":"tinycontrol","product":"Lan Kontroler v3.5","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.67","versionType":"semver"}]},{"vendor":"tinycontrol","product":"LK3.9","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.75","versionType":"semver"}]},{"vendor":"tinycontrol","product":"LK4","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.38","versionType":"semver"}]},{"vendor":"tinycontrol","product":"tcPDU","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.36","versionType":"semver"}]}],"references":["https://cert.pl/en/posts/2026/03/CVE-2025-11500/","https://securitum.com/CVE-2025-11500","https://tinycontrol.pl/en/archives/lan-controller-35/downloads/#firmware","https://tinycontrol.pl/en/lk39/downloads/#firmware","https://tinycontrol.pl/en/lk4/downloads/#firmware","https://tinycontrol.pl/en/tcpdu/downloads/#firmware"],"weaknesses":["CWE-261","CWE-201"],"ingestedAt":"2026-10-29T20:08:31.050Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/11xxx/CVE-2025-11500.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-11500","state":"PUBLISHED","datePublished":"2026-03-16T09:26:14.290Z","dateUpdated":"2026-03-16T16:24:33.361Z","assignerShortName":"CERT-PL","assignerOrgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateReserved":"2025-10-08T14:14:53.731Z"},"containers":{"cna":{"title":"Credentials exposure in tinycontrol devices","descriptions":[{"lang":"en","value":"Tinycontrol devices such as tcPDU and LAN Controllers LK3.5, LK3.9 and LK4 have two separate authentication mechanisms - one solely for interface management and one for protecting all other server resources. When the latter is turned off (which is a default setting), an unauthenticated attacker on the local network can obtain usernames and encoded passwords for interface management portal by inspecting the HTTP response of the server when visiting the login page, which contains a JSON file with these details. Both normal and admin users credentials are exposed. \nThis issue has been fixed in firmware versions: 1.36 (for tcPDU), 1.67 (for LK3.5 - hardware versions: 3.5, 3.6, 3.7 and 3.8), 1.75 (for LK3.9 - hardware version 3.9) and 1.38 (for LK4 - hardware version 4.0)."}],"affected":[{"vendor":"tinycontrol","product":"Lan Kontroler v3.5","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.67","versionType":"semver"}]},{"vendor":"tinycontrol","product":"LK3.9","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.75","versionType":"semver"}]},{"vendor":"tinycontrol","product":"LK4","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.38","versionType":"semver"}]},{"vendor":"tinycontrol","product":"tcPDU","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.36","versionType":"semver"}]}],"references":[{"url":"https://cert.pl/en/posts/2026/03/CVE-2025-11500/","tags":["third-party-advisory"]},{"url":"https://securitum.com/CVE-2025-11500","tags":["technical-description"]},{"url":"https://tinycontrol.pl/en/archives/lan-controller-35/downloads/#firmware","tags":["release-notes"]},{"url":"https://tinycontrol.pl/en/lk39/downloads/#firmware","tags":["release-notes"]},{"url":"https://tinycontrol.pl/en/lk4/downloads/#firmware","tags":["release-notes"]},{"url":"https://tinycontrol.pl/en/tcpdu/downloads/#firmware","tags":["release-notes"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"ADJACENT","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-261","description":"CWE-261 Weak Encoding for Password","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-201","description":"CWE-201 Insertion of Sensitive Information Into Sent Data","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-PL","orgId":"4bb8329e-dd38-46c1-aafb-9bf32bcb93c6","dateUpdated":"2026-03-16T09:26:14.290Z"},"credits":[{"lang":"en","type":"finder","value":"Paweł Różański (Securitum.com)"}],"source":{"discovery":"EXTERNAL"},"workarounds":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Enabling \"Basic Authentication\" option mitigates the risk, because an attacker has to log in first prior to exploitation. "}],"value":"Enabling \"Basic Authentication\" option mitigates the risk, because an attacker has to log in first prior to exploitation."}],"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-16T16:24:05.827486Z","id":"CVE-2025-11500","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-03-16T16:24:33.361Z"}}]}}}