{"id": "CVE-2020-29583", "cveTags": [], "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 10.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 3.9}]}, "published": "2020-12-22T22:15:14.443", "references": [{"url": "http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C0_2.pdf", "tags": ["Broken Link"], "source": "cve@mitre.org"}, {"url": "https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15", "tags": ["Release Notes"], "source": "cve@mitre.org"}, {"url": "https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html", "tags": ["Broken Link", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-allow-for-administrative-access-cve-2020-29583/", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.zyxel.com/support/CVE-2020-29583.shtml", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "https://www.zyxel.com/support/security_advisories.shtml", "tags": ["Vendor Advisory"], "source": "cve@mitre.org"}, {"url": "http://ftp.zyxel.com/USG40/firmware/USG40_4.60%28AALA.1%29C0_2.pdf", "tags": ["Broken Link"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://businessforum.zyxel.com/discussion/5252/zld-v4-60-revoke-and-wk48-firmware-release", "tags": ["Release Notes"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://businessforum.zyxel.com/discussion/5254/whats-new-for-zld4-60-patch-1-available-on-dec-15", "tags": ["Release Notes"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.eyecontrol.nl/blog/undocumented-user-account-in-zyxel-products.html", "tags": ["Broken Link", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.secpod.com/blog/a-secret-zyxel-firewall-and-ap-controllers-could-allow-for-administrative-access-cve-2020-29583/", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.zyxel.com/support/CVE-2020-29583.shtml", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.zyxel.com/support/security_advisories.shtml", "tags": ["Vendor Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-29583", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-522"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-522"}]}], "descriptions": [{"lang": "en", "value": "Firmware version 4.60 of Zyxel USG devices contains an undocumented account (zyfwp) with an unchangeable password. The password for this account can be found in cleartext in the firmware. This account can be used by someone to login to the ssh server or web interface with admin privileges."}, {"lang": "es", "value": "La versi\u00f3n de firmware 4.60 de los dispositivos Zyxel USG contiene una cuenta no documentada (zyfwp) con una contrase\u00f1a que no puede ser cambiada. La contrase\u00f1a para esta cuenta se puede encontrar en texto sin cifrar en el firmware. Esta cuenta puede ser usada por alguien para iniciar sesi\u00f3n en el servidor ssh o en la interfaz web con privilegios de administrador"}], "lastModified": "2025-10-22T00:17:05.617", "cisaActionDue": "2022-05-03", "cisaExploitAdd": "2021-11-03", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:usg20-vpn_firmware:4.60:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "660A9038-66FB-4F71-BA50-8ED69C2E2274"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:usg20-vpn:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": 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