{"id":"CVE-2021-4039","aliases":["EUVD-2021-33939","GHSA-9ww2-qwrq-m7wv"],"status":"published","title":"A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could...","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.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.71048,"percentile":0.9941,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-78"],"published":"2022-03-01T06:40:09Z","modified":"2026-06-17T04:18:56Z","exploits":[{"source":"exploitdb","id":"EDB-50870","title":"Zyxel NWA-1100-NH - Command Injection","type":"remote","platform":"hardware","date":"2022-04-19","url":"https://www.exploit-db.com/exploits/50870"}],"products":[{"vendor":"zyxel","product":"nwa1100-nh firmware"},{"vendor":"zyxel","product":"nwa1100-nh_firmware"}],"references":[{"url":"https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory"]},{"url":"http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html","tags":["x_refsource_MISC","x_transferred","Exploit","Release Notes","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-4039"},{"url":"https://github.com/advisories/GHSA-9ww2-qwrq-m7wv"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2022-03-01T06:40:09Z","modified":"2024-08-03T17:16:03.702Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:33:08.045407Z"}],"euvd":[{"id":"EUVD-2021-33939","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.","status":"published","published":"2022-03-01T06:40:09Z","modified":"2024-08-03T17:16:03Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-03T03:25:10.888157Z"}],"ghsa":[{"id":"GHSA-9ww2-qwrq-m7wv","title":"A command injection vulnerability in the web interface of the Zyxel NWA-1100-NH firmware could...","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.","status":"published","published":"2022-03-02T00:00:20Z","modified":"2023-02-03T05:06:20Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:53:53.309122Z"}],"nvd":[{"id":"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.","status":"published","published":"2022-03-01T07:15:08.223Z","modified":"2026-06-17T04:18:56.247Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":10,"vector":"AV:N/AC:L/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:07:05.198719Z"}]}}