{"api_version":"1","generated_at":"2026-07-24T01:47:51+00:00","cve":"CVE-2020-27866","urls":{"html":"https://cve.report/CVE-2020-27866","api":"https://cve.report/api/cve/CVE-2020-27866.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-27866","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-27866"},"summary":{"title":"CVE-2020-27866","description":"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.","state":"PUBLIC","assigner":"zdi-disclosures@trendmicro.com","published_at":"2021-02-12 00:15:00","updated_at":"2021-03-26 19:34:00"},"problem_types":["CWE-288"],"metrics":[],"references":[{"url":"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/","name":"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/","refsource":"MISC","tags":["Third Party Advisory","VDB Entry"],"title":"ZDI-20-1451 | Zero Day Initiative","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers","name":"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers","refsource":"MISC","tags":["Vendor Advisory"],"title":"Security Advisory for Password Recovery Vulnerabilities on Some Routers | Answer | NETGEAR Support","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-27866","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-27866","name":"NVD vulnerability 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Routers","version":{"version_data":[{"version_value":"firmware version 1.2.0.62_1.0.1"}]}}]},"vendor_name":"NETGEAR"}]}},"credit":"1sd3d of Viettel Cyber Security","data_format":"MITRE","data_type":"CVE","data_version":"4.0","description":{"description_data":[{"lang":"eng","value":"This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-288: Authentication Bypass Using an Alternate Path or Channel"}]}]},"references":{"reference_data":[{"url":"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers","refsource":"MISC","name":"https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/","refsource":"MISC","name":"https://www.zerodayinitiative.com/advisories/ZDI-20-1451/"}]},"impact":{"cvss":{"vectorString":"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.0"}}},"nvd":{"publishedDate":"2021-02-12 00:15:00","lastModifiedDate":"2021-03-26 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vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"27866","Ordinal":"2","NoteData":"2021-02-11","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"27866","Ordinal":"3","NoteData":"2021-03-12","Type":"Other","Title":"Modified"}]}}}