{"id":"CVE-2025-54465","state":"PUBLISHED","title":"Hard-coded Credentials Vulnerability in ZKTeco WL20","description":"This vulnerability exists in ZKTeco WL20 due to hard-coded MQTT credentials and endpoints stored in plaintext within the device firmware. An attacker with physical access could exploit this vulnerability by extracting the firmware and analyzing the binary data to retrieve the hard-coded MQTT credentials and endpoints from the targeted device.\n\nSuccessful exploitation of this vulnerability could allow the attacker to gain unauthorized access to the MQTT broker and manipulate the communications of the targeted device.","publishedAt":"2025-08-13T11:17:41.081Z","updatedAt":"2025-08-13T13:09:41.836Z","severity":{"score":6.8,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"CERT-In"},"assigner":"CERT-In","products":["ZKTeco Co WL20 Biometric Attendance System"],"affected":[{"vendor":"ZKTeco Co","product":"WL20 Biometric Attendance System","defaultStatus":"unaffected","versions":[{"version":"<=ZLM31-FXO1-3.1.8","status":"affected"}]}],"references":["https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOTES01&VLCODE=CIVN-2025-0172","https://www.zkteco.com/en/Security_Bulletinsibs/20"],"weaknesses":["CWE-798"],"ingestedAt":"2026-10-29T20:09:31.862Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/54xxx/CVE-2025-54465.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"cveId":"CVE-2025-54465","state":"PUBLISHED","datePublished":"2025-08-13T11:17:41.081Z","dateUpdated":"2025-08-13T13:09:41.836Z","assignerShortName":"CERT-In","assignerOrgId":"66834db9-ab24-42b4-be80-296b2e40335c","dateReserved":"2025-07-22T08:56:34.299Z"},"containers":{"cna":{"title":"Hard-coded Credentials Vulnerability in ZKTeco WL20","descriptions":[{"lang":"en","value":"This vulnerability exists in ZKTeco WL20 due to hard-coded MQTT credentials and endpoints stored in plaintext within the device firmware. An attacker with physical access could exploit this vulnerability by extracting the firmware and analyzing the binary data to retrieve the hard-coded MQTT credentials and endpoints from the targeted device.\n\nSuccessful exploitation of this vulnerability could allow the attacker to gain unauthorized access to the MQTT broker and manipulate the communications of the targeted device."}],"affected":[{"vendor":"ZKTeco Co","product":"WL20 Biometric Attendance System","defaultStatus":"unaffected","versions":[{"version":"<=ZLM31-FXO1-3.1.8","status":"affected"}]}],"references":[{"url":"https://www.cert-in.org.in/s2cMainServlet?pageid=PUBVLNOTES01&VLCODE=CIVN-2025-0172","tags":["third-party-advisory"]},{"url":"https://www.zkteco.com/en/Security_Bulletinsibs/20","tags":["vendor-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"PHYSICAL","baseScore":6.8,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnerabilityResponseEffort":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-798","description":"CWE-798: Use of Hard-coded Credentials","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"CERT-In","orgId":"66834db9-ab24-42b4-be80-296b2e40335c","dateUpdated":"2025-08-13T11:17:41.081Z"},"credits":[{"lang":"en","type":"finder","value":"This vulnerability is reported by Shravan Singh from Kavach IoT Security."}],"solutions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Upgrade ZKTeco WL20 Biometric Attendance System firmware to version ZLM31-FXO1-4.0.3.<br><a target=\"_blank\" rel=\"nofollow\" href=\"https://www.zkteco.com/en/Security_Bulletinsibs/20\">https://www.zkteco.com/en/Security_Bulletinsibs/20</a><br>"}],"value":"Upgrade ZKTeco WL20 Biometric Attendance System firmware to version ZLM31-FXO1-4.0.3.\n https://www.zkteco.com/en/Security_Bulletinsibs/20"}],"source":{"discovery":"UNKNOWN"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-08-13T13:09:37.206727Z","id":"CVE-2025-54465","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":"2025-08-13T13:09:41.836Z"}}]}}}