{"api_version":"1","generated_at":"2026-05-12T15:28:34+00:00","cve":"CVE-2021-35028","urls":{"html":"https://cve.report/CVE-2021-35028","api":"https://cve.report/api/cve/CVE-2021-35028.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2021-35028","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2021-35028"},"summary":{"title":"CVE-2021-35028","description":"A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands.","state":"PUBLIC","assigner":"security@zyxel.com.tw","published_at":"2021-09-29 11:15:00","updated_at":"2021-10-02 15:18:00"},"problem_types":["CWE-78"],"metrics":[],"references":[{"url":"https://www.zyxel.com/support/Zyxel_security_advisory_for_directory_traversal_and_command_injection_vulnerabilities_of_VPN2S_Firewall.shtml","name":"https://www.zyxel.com/support/Zyxel_security_advisory_for_directory_traversal_and_command_injection_vulnerabilities_of_VPN2S_Firewall.shtml","refsource":"MISC","tags":[],"title":"404 Error | Zyxel","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-35028","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-35028","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2021","cve_id":"35028","vulnerable":"-1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"h","cpe4":"zyxel","cpe5":"zywall_vpn2s","cpe6":"-","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2021","cve_id":"35028","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"o","cpe4":"zyxel","cpe5":"zywall_vpn2s_firmware","cpe6":"1.12\\(abln.0\\)c0","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-2021-35028","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"Zyxel","product":{"product_data":[{"product_name":"ZyWALL VPN2S Firmware","version":{"version_data":[{"version_value":"1.12(ABLN.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":[{"url":"https://www.zyxel.com/support/Zyxel_security_advisory_for_directory_traversal_and_command_injection_vulnerabilities_of_VPN2S_Firewall.shtml","refsource":"MISC","name":"https://www.zyxel.com/support/Zyxel_security_advisory_for_directory_traversal_and_command_injection_vulnerabilities_of_VPN2S_Firewall.shtml"}]},"impact":{"cvss":{"baseScore":"7.3","vectorString":"CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:H","version":"3.1"}},"description":{"description_data":[{"lang":"eng","value":"A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands."}]}},"nvd":{"publishedDate":"2021-09-29 11:15:00","lastModifiedDate":"2021-10-02 15:18:00","problem_types":["CWE-78"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:L/AC:L/Au:N/C:C/I:C/A:C","accessVector":"LOCAL","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE","baseScore":7.2},"severity":"HIGH","exploitabilityScore":3.9,"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:zywall_vpn2s_firmware:1.12\\(abln.0\\)c0:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:h:zyxel:zywall_vpn2s:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":{"CveYear":"2021","CveId":"35028","Ordinal":"210508","Title":"CVE-2021-35028","CVE":"CVE-2021-35028","Year":"2021"},"notes":[{"CveYear":"2021","CveId":"35028","Ordinal":"1","NoteData":"A command injection vulnerability in the CGI program of the Zyxel VPN2S firmware version 1.12 could allow an authenticated, local user to execute arbitrary OS commands.","Type":"Description","Title":null},{"CveYear":"2021","CveId":"35028","Ordinal":"2","NoteData":"2021-09-29","Type":"Other","Title":"Published"},{"CveYear":"2021","CveId":"35028","Ordinal":"3","NoteData":"2021-09-29","Type":"Other","Title":"Modified"}]}}}