CVE-2020-13365

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "B045EF5D-B584-4DAA-B0EF-149310C61AC1", "versionEndExcluding": "v5.21\\(aazf.9\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*", "matchCriteriaId": "E0A01B19-4A91-4FBC-8447-2E854346DAC5", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nas520_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "D88E8EAE-2492-421F-A904-CE167C0C6B61", "versionEndExcluding": "v5.21\\(aasz.5\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nas520:-:*:*:*:*:*:*:*", "matchCriteriaId": "07B2BA3D-40F0-4D59-8838-B226FAABF27E", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nas540_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "8D4A8264-3806-47C1-BDCB-04C569BC74CD", "versionEndExcluding": "v5.21\\(aatb.6\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nas540:-:*:*:*:*:*:*:*", "matchCriteriaId": "B2F7264C-D32A-4EE9-BADC-78518D762BCA", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:zyxel:nas542_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "23F5B87E-5526-4CDD-8F96-D78C00B7B490", "versionEndExcluding": "v5.21\\(abag.6\\)c0", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nas542:-:*:*:*:*:*:*:*", "matchCriteriaId": "31C4DD0F-28D0-4BF7-897B-5EEC32AA7277", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Certain Zyxel products have a locally accessible binary that allows a non-root user to generate a password for an undocumented user account that can be used for a TELNET session as root. This affects NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, and V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, and V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 and V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 and 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, and V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 and V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; and NAS540 V5.21(AATB.5)C0 and V5.21(AATB.3)C0."}, {"lang": "es", "value": "Determinados productos Zyxel tienen un binario accesible localmente que permite a un usuario no root generar una contrase\u00f1a para una cuenta de usuario no documentada que puede ser usada para una sesi\u00f3n de TELNET como root. Esto afecta a NAS520 V5.21(AASZ.4)C0, V5.21(AASZ.0)C0, V5.11(AASZ.3)C0, y V5.11(AASZ.0)C0; NAS542 V5.11(ABAG.0)C0, V5.20(ABAG.1)C0, y V5.21(ABAG.3)C0; NSA325 v2_V4.81(AALS.0)C0 y V4.81(AAAJ.1)C0; NSA310 4.22(AFK.0)C0 y 4.22(AFK.1)C0; NAS326 V5.21(AAZF.8)C0, V5.11(AAZF.4)C0, V5.11(AAZF.2)C0, y V5.11(AAZF.3)C0; NSA310S V4.75(AALH.2)C0; NSA320S V4.75(AANV.2)C0 y V4.75(AANV.1)C0; NSA221 V4.41(AFM.1)C0; y NAS540 V5.21(AATB.5)C0 y V5.21(AATB.3)C0"}], "id": "CVE-2020-13365", "lastModified": "2026-06-17T02:53:02.053", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "cve@mitre.org", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-08-06T17:15:10.957", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/us/en/support/security_advisories.shtml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/support/Zyxel-security-advisory-for-NAS-remote-access-vulnerability.shtml"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://www.zyxel.com/us/en/support/security_advisories.shtml"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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