{"id":"CVE-2021-4029","aliases":["EUVD-2021-33930","GHSA-47g9-xhm7-62xr"],"status":"published","title":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could...","description":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00748,"percentile":0.55155,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2022-02-22T14:25:14Z","modified":"2026-06-17T04:18:55Z","products":[{"vendor":"zyxel","product":"armor z1 (nbg6816) firmware"},{"vendor":"zyxel","product":"armor z2 (nbg6817) firmware"},{"vendor":"zyxel","product":"nbg6816_firmware"},{"vendor":"zyxel","product":"nbg6817_firmware"}],"references":[{"url":"https://www.zyxel.com/support/forgery-vulnerabilities-of-select-Armor-home-routers.shtml","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4029"},{"url":"https://github.com/advisories/GHSA-47g9-xhm7-62xr"}],"sources":{"cve":[{"id":"CVE-2021-4029","description":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.","status":"published","published":"2022-02-22T14:25:14Z","modified":"2024-08-03T17:16:03.566Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-33930","description":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.","status":"published","published":"2022-02-22T14:25:14Z","modified":"2024-08-03T17:16:03Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-03T03:25:10.888157Z"}],"ghsa":[{"id":"GHSA-47g9-xhm7-62xr","title":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could...","description":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.","status":"published","published":"2022-02-25T00:01:07Z","modified":"2023-02-03T05:06:08Z","cwes":["CWE-78"],"updated_at":"2026-11-02T14:53:51.237254Z"}],"nvd":[{"id":"CVE-2021-4029","description":"A command injection vulnerability in the CGI program of the Zyxel ARMOR Z1/Z2 firmware could allow an attacker to execute arbitrary OS commands via a LAN interface.","status":"published","published":"2022-02-24T15:15:25.15Z","modified":"2026-06-17T04:18:55.18Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":8.3,"vector":"AV:A/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:04.6896Z"}]}}