{
    "id": "CVE-2021-4039",
    "published": "2022-03-01 07:15:08",
    "last_modified": "2026-06-17 04:18:56",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-78",
    "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.",
    "epss_score": "0.71048",
    "epss_percentile": "0.99388",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:28:58",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "zyxel",
            "product": "nwa1100-nh"
        },
        {
            "vendor": "zyxel",
            "product": "nwa1100-nh_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "50870",
            "title": "Zyxel NWA-1100-NH - Command Injection",
            "date": "2022-04-19",
            "url": "https://www.exploit-db.com/exploits/50870"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html",
        "https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml",
        "http://packetstormsecurity.com/files/166752/Zyxel-NWA-1100-NH-Command-Injection.html",
        "https://www.zyxel.com/support/OS-command-injection-vulnerability-of-NWA1100-NH-access-point.shtml"
    ]
}