{
    "id": "CVE-2024-21899",
    "published": "2024-03-08 17:15:22",
    "last_modified": "2026-06-17 07:10:22",
    "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": "An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.1.3.2578 build 20231110 and later\nQTS 4.5.4.2627 build 20231225 and later\nQuTS hero h5.1.3.2578 build 20231110 and later\nQuTS hero h4.5.4.2626 build 20231225 and later\nQuTScloud c5.1.5.2651 and later\n",
    "epss_score": "0.24365",
    "epss_percentile": "0.97807",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:42",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 24.4% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "qnap",
            "product": "qts"
        },
        {
            "vendor": "qnap",
            "product": "quts_hero"
        },
        {
            "vendor": "qnap",
            "product": "qutscloud"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://www.qnap.com/en/security-advisory/qsa-24-09",
        "https://www.qnap.com/en/security-advisory/qsa-24-09"
    ]
}