{"schema":"threatline.record/2","record":{"id":"CVE-2020-29583","aliases":[],"summary":"Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability","details":"Zyxel firewalls (ATP, USG, VM) and AP Controllers (NXC2500 and NXC5500) contain a use of hard-coded credentials vulnerability in an undocumented account (\"zyfwp\") with an unchangeable password.","categories":["Network & edge"],"product":"Multiple Products","vendor":"Zyxel","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2020-29583","source_modified_at":"2025-10-21T23:35:31.245Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"n/a","vendor":"n/a","versions":[{"version":"n/a","status":"affected"}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2021-11-03","due_date":"2022-05-03","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.90155,"percentile":0.998,"score_date":"2026-10-23"},"published_at":"2020-12-22T00:00:00.000Z","modified_at":"2025-10-21T23:35:31.245Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2020-29583","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2025-10-21T23:35:31.245Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-29583.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2020-29583","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-29583","source":"CISA KEV"},{"source":"CVE List","url":"https://www.zyxel.com/support/security_advisories.shtml","tags":["x_transferred"]},{"source":"CVE List","url":"https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15","tags":["x_transferred"]},{"source":"CVE List","url":"https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.zyxel.com/support/CVE-2020-29583.shtml","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-allow-for-administrative-access-cve-2020-29583/","tags":["x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29583","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2025-02-10T22:11:59.767015Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"ZyXel USG - Hardcoded Credentials","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-29583.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"vendor and product","confidence":"heuristic","reviewed":false},"change_timestamp":"2025-10-21T23:35:31.245Z","content_hash":"1dfca248e4d5f40aed3dfd998b84895de2ee1b5b113e876e29a2bc7f0c484156"}}