{
    "id": "CVE-2021-28152",
    "published": "2021-05-06 16:15:07",
    "last_modified": "2026-06-17 03:45:53",
    "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-287",
    "description": "Hongdian H8922 3.0.5 devices have an undocumented feature that allows access to a shell as a superuser. To connect, the telnet service is used on port 5188 with the default credentials of root:superzxmn.",
    "epss_score": "0.05185",
    "epss_percentile": "0.92242",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-07 18:17:25",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "hongdian",
            "product": "h8922"
        },
        {
            "vendor": "hongdian",
            "product": "h8922_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://en.hongdian.com/Products/Details/H8922",
        "https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/",
        "http://en.hongdian.com/Products/Details/H8922",
        "https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/"
    ]
}