{
    "id": "CVE-2020-28971",
    "published": "2020-12-01 16:15:11",
    "last_modified": "2026-06-17 03:10:55",
    "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 issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115. A NAS Admin authentication bypass vulnerability could allow an unauthenticated user to execute privileged commands on the device via a cookie, because of insufficient validation of URI paths.",
    "epss_score": "0.03831",
    "epss_percentile": "0.89820",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-08 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": "westerndigital",
            "product": "my_cloud_ex2_ultra"
        },
        {
            "vendor": "westerndigital",
            "product": "my_cloud_ex4100"
        },
        {
            "vendor": "westerndigital",
            "product": "my_cloud_mirror_gen_2"
        },
        {
            "vendor": "westerndigital",
            "product": "my_cloud_os_5"
        },
        {
            "vendor": "westerndigital",
            "product": "my_cloud_pr2100"
        },
        {
            "vendor": "westerndigital",
            "product": "my_cloud_pr4100"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads",
        "https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115",
        "https://www.zerodayinitiative.com/advisories/ZDI-20-1447/",
        "https://support.wdc.com/downloads.aspx?g=907&lang=en#downloads",
        "https://www.westerndigital.com/support/productsecurity/wdc-20009-os5-firmware-5-06-115",
        "https://www.zerodayinitiative.com/advisories/ZDI-20-1447/"
    ]
}