{
    "id": "CVE-2021-40540",
    "published": "2021-09-07 02:15:07",
    "last_modified": "2026-06-17 04:07:06",
    "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": null,
    "description": "ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests.",
    "epss_score": "0.02628",
    "epss_percentile": "0.85119",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-13 18:17:29",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "ulfius_project",
            "product": "ulfius"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://packetstormsecurity.com/files/164152/Ulfius-Web-Framework-Remote-Memory-Corruption.html",
        "https://github.com/babelouest/ulfius/commit/c83f564c184a27145e07c274b305cabe943bbfaa",
        "https://github.com/babelouest/ulfius/compare/v2.7.3...v2.7.4",
        "http://packetstormsecurity.com/files/164152/Ulfius-Web-Framework-Remote-Memory-Corruption.html",
        "https://github.com/babelouest/ulfius/commit/c83f564c184a27145e07c274b305cabe943bbfaa",
        "https://github.com/babelouest/ulfius/compare/v2.7.3...v2.7.4"
    ]
}