{
    "id": "CVE-2021-20716",
    "published": "2021-04-28 01:15:17",
    "last_modified": "2026-06-17 03:34:18",
    "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": "Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 and prior, WLI3-TX1-G54 firmware Ver.2.53 and prior, WLI-T1-B11 firmware Ver.2.20 and prior, WLI-TX1-G54 firmware Ver.2.20 and prior, WVR-G54-NF firmware Ver.2.02 and prior, WZR-G108 firmware Ver.2.41 and prior, WZR-G54 firmware Ver.2.41 and prior, WZR-HP-G54 firmware Ver.2.41 and prior, WZR-RS-G54 firmware Ver.2.55 and prior, and WZR-RS-G54HP firmware Ver.2.55 and prior) allows a remote attacker to enable the debug option and to execute arbitrary code or OS commands, change the configuration, and cause a denial of service (DoS) condition.",
    "epss_score": "0.03179",
    "epss_percentile": "0.87705",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-10 18:17:24",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "buffalo",
            "product": "bhr-4rv"
        },
        {
            "vendor": "buffalo",
            "product": "bhr-4rv_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "fs-g54"
        },
        {
            "vendor": "buffalo",
            "product": "fs-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-b11"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-b11_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-g54"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-g54l"
        },
        {
            "vendor": "buffalo",
            "product": "wbr-g54l_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-b11"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-b11_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-g54"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-g54-kd"
        },
        {
            "vendor": "buffalo",
            "product": "wbr2-g54-kd_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr-g54"
        },
        {
            "vendor": "buffalo",
            "product": "whr-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr-g54-nf"
        },
        {
            "vendor": "buffalo",
            "product": "whr-g54-nf_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-a54g54"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-a54g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-g54"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-g54v"
        },
        {
            "vendor": "buffalo",
            "product": "whr2-g54v_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "whr3-ag54"
        },
        {
            "vendor": "buffalo",
            "product": "whr3-ag54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wla-b11"
        },
        {
            "vendor": "buffalo",
            "product": "wla-b11_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wla-g54"
        },
        {
            "vendor": "buffalo",
            "product": "wla-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wla-g54c"
        },
        {
            "vendor": "buffalo",
            "product": "wla-g54c_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wla2-g54"
        },
        {
            "vendor": "buffalo",
            "product": "wla2-g54_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wla2-g54c"
        },
        {
            "vendor": "buffalo",
            "product": "wla2-g54c_firmware"
        },
        {
            "vendor": "buffalo",
            "product": "wlah-a54g54"
        },
        {
            "vendor": "buffalo",
            "product": "wlah-a54g54_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://jvn.jp/en/vu/JVNVU90274525/index.html",
        "https://www.buffalo.jp/news/detail/20210427-02.html",
        "https://jvn.jp/en/vu/JVNVU90274525/index.html",
        "https://www.buffalo.jp/news/detail/20210427-02.html"
    ]
}