{"api_version":"1","generated_at":"2026-04-23T08:39:36+00:00","cve":"CVE-2021-4039","urls":{"html":"https://cve.report/CVE-2021-4039","api":"https://cve.report/api/cve/CVE-2021-4039.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-4039","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-4039"},"summary":{"title":"CVE-2021-4039","description":"A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device.","state":"PUBLIC","assigner":"security@zyxel.com.tw","published_at":"2022-03-01 07:15:00","updated_at":"2022-04-28 14:02:00"},"problem_types":["CWE-78"],"metrics":[],"references":[{"url":"http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html","name":"http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html","refsource":"MISC","tags":[],"title":"Zyxel NWA-1100-NH Command Injection ≈ Packet Storm","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml","name":"https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml","refsource":"CONFIRM","tags":[],"title":"Zyxel security advisory for OS command injection vulnerability of NWA1100-NH access point | Zyxel","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-4039","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4039","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"4039","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"nwa1100-nh","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"4039","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"nwa1100-nh_firmware","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ASSIGNER":"security@zyxel.com.tw","ID":"CVE-2021-4039","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Zyxel","product":{"product_data":[{"product_name":"NWA1100-NH firmware","version":{"version_data":[{"version_value":"2.12(AASI.0)C0"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')"}]}]},"references":{"reference_data":[{"refsource":"CONFIRM","name":"https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml","url":"https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml"},{"refsource":"MISC","name":"http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html","url":"http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html"}]},"impact":{"cvss":{"baseScore":"9.8","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},"description":{"description_data":[{"lang":"eng","value":"A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could allow an attacker to execute arbitrary OS commands on the device."}]}},"nvd":{"publishedDate":"2022-03-01 07:15:00","lastModifiedDate":"2022-04-28 14:02:00","problem_types":["CWE-78"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.8,"baseSeverity":"CRITICAL"},"exploitabilityScore":3.9,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:C/I:C/A:C","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE","baseScore":10},"severity":"HIGH","exploitabilityScore":10,"impactScore":10,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:o:zyxel:nwa1100-nh_firmware:*:*:*:*:*:*:*:*","versionEndExcluding":"2.12\\(aasi.3\\)c0","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:nwa1100-nh:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"4039","Ordinal":"222280","Title":"CVE-2021-4039","CVE":"CVE-2021-4039","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"4039","Ordinal":"1","NoteData":"** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided.","Type":"Description","Title":null}]}}}