{
    "id": "CVE-2021-39510",
    "published": "2021-08-24 19:15:33",
    "last_modified": "2026-06-17 04:03:44",
    "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-77",
    "description": "An issue was discovered in D-Link DIR816_A1_FW101CNB04 750m11ac wireless router, The HTTP request parameter is used in the handler function of /goform/form2userconfig.cgi route, which can construct the user name string to delete the user function. This can lead to command injection through shell metacharacters.",
    "epss_score": "0.08624",
    "epss_percentile": "0.94954",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-05 18:17:26",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "dlink",
            "product": "dir-816"
        },
        {
            "vendor": "dlink",
            "product": "dir-816_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection",
        "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection/blob/main/injection_A1.md",
        "https://www.dlink.com/en/security-bulletin/",
        "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection",
        "https://github.com/doudoudedi/main-DIR-816_A1_Command-injection/blob/main/injection_A1.md",
        "https://www.dlink.com/en/security-bulletin/"
    ]
}