CVE-2021-3297

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2025-11-25T17:27:20.441Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"url": "https://www.zyxel.com/us/en/support/security_advisories.shtml"}, {"url": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105"}, {"url": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass"}, {"url": "https://codeberg.org/nieldk/vulnerabilities/src/branch/main/zyxel%20nbg2105/Admin%20bypass"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-3297", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://www.zyxel.com/us/en/support/security_advisories.shtml", "refsource": "MISC", "url": "https://www.zyxel.com/us/en/support/security_advisories.shtml"}, {"name": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105", "refsource": "MISC", "url": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105"}, {"name": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass", "refsource": "MISC", "url": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T16:53:17.612Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.zyxel.com/us/en/support/security_advisories.shtml"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-3297", "datePublished": "2021-01-26T07:11:41.000Z", "dateReserved": "2021-01-25T00:00:00.000Z", "dateUpdated": "2025-11-25T17:27:20.441Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.2"}

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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:nbg2105_firmware:v1.00\\(aagu.2\\)c0:*:*:*:*:*:*:*", "matchCriteriaId": "4F4D6339-4E7F-4743-8AC5-E9325A5C0A73", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:zyxel:nbg2105:-:*:*:*:*:*:*:*", "matchCriteriaId": "0477B359-971A-457D-876F-283FA36BF114", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "On Zyxel NBG2105 V1.00(AAGU.2)C0 devices, setting the login cookie to 1 provides administrator access."}, {"lang": "es", "value": "En dispositivos Zyxel NBG2105 versi\u00f3n V1.00 (AAGU.2)CO, al establecer la cookie de inicio de sesi\u00f3n en 1 proporciona acceso de administrador"}], "id": "CVE-2021-3297", "lastModified": "2026-06-17T04:04:54.203", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-01-26T18:16:29.770", "references": [{"source": "cve@mitre.org", "url": "https://codeberg.org/nieldk/vulnerabilities/src/branch/main/zyxel%20nbg2105/Admin%20bypass"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass"}, {"source": "cve@mitre.org", "tags": ["Product", "Vendor Advisory"], "url": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105"}, {"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": ["Exploit", "Third Party Advisory"], "url": "https://github.com/nieldk/vulnerabilities/blob/main/zyxel%20nbg2105/Admin%20bypass"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Vendor Advisory"], "url": "https://www.zyxel.com/support/SupportLandingSR.shtml?c=gb&l=en&kbid=M-01490&md=NBG2105"}, {"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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