{
    "id": "CVE-2020-25014",
    "published": "2020-11-27 18:15:11",
    "last_modified": "2026-06-17 03:06:14",
    "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-787",
    "description": "A stack-based buffer overflow in fbwifi_continue.cgi on Zyxel UTM and VPN series of gateways running firmware version V4.30 through to V4.55 allows remote unauthenticated attackers to execute arbitrary code via a crafted http packet.",
    "epss_score": "0.04440",
    "epss_percentile": "0.91136",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-07 18:17:23",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9.8), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "zyxel",
            "product": "access_points_firmware"
        },
        {
            "vendor": "zyxel",
            "product": "nwa1123-ac_hd"
        },
        {
            "vendor": "zyxel",
            "product": "nwa1123-ac_pro"
        },
        {
            "vendor": "zyxel",
            "product": "nwa1123-acv2"
        },
        {
            "vendor": "zyxel",
            "product": "usg_110"
        },
        {
            "vendor": "zyxel",
            "product": "usg_1100"
        },
        {
            "vendor": "zyxel",
            "product": "usg_1900"
        },
        {
            "vendor": "zyxel",
            "product": "usg_20w"
        },
        {
            "vendor": "zyxel",
            "product": "usg_20w-vpn"
        },
        {
            "vendor": "zyxel",
            "product": "usg_2200-vpn"
        },
        {
            "vendor": "zyxel",
            "product": "usg_310"
        },
        {
            "vendor": "zyxel",
            "product": "usg_40"
        },
        {
            "vendor": "zyxel",
            "product": "usg_40w"
        },
        {
            "vendor": "zyxel",
            "product": "usg_60"
        },
        {
            "vendor": "zyxel",
            "product": "usg_60w"
        },
        {
            "vendor": "zyxel",
            "product": "usg_flex_100"
        },
        {
            "vendor": "zyxel",
            "product": "usg_flex_100w"
        },
        {
            "vendor": "zyxel",
            "product": "usg_flex_200"
        },
        {
            "vendor": "zyxel",
            "product": "usg_flex_500"
        },
        {
            "vendor": "zyxel",
            "product": "usg_flex_700"
        },
        {
            "vendor": "zyxel",
            "product": "usg110"
        },
        {
            "vendor": "zyxel",
            "product": "usg1100"
        },
        {
            "vendor": "zyxel",
            "product": "usg1900"
        },
        {
            "vendor": "zyxel",
            "product": "usg20-vpn"
        },
        {
            "vendor": "zyxel",
            "product": "usg20w-vpn"
        },
        {
            "vendor": "zyxel",
            "product": "usg210"
        },
        {
            "vendor": "zyxel",
            "product": "usg2200-vpn"
        },
        {
            "vendor": "zyxel",
            "product": "usg310"
        },
        {
            "vendor": "zyxel",
            "product": "usg40"
        },
        {
            "vendor": "zyxel",
            "product": "usg40w"
        },
        {
            "vendor": "zyxel",
            "product": "usg60"
        },
        {
            "vendor": "zyxel",
            "product": "usg60w"
        },
        {
            "vendor": "zyxel",
            "product": "vpn100"
        },
        {
            "vendor": "zyxel",
            "product": "vpn300"
        },
        {
            "vendor": "zyxel",
            "product": "vpn50"
        },
        {
            "vendor": "zyxel",
            "product": "wax510d"
        },
        {
            "vendor": "zyxel",
            "product": "zld"
        },
        {
            "vendor": "zyxel",
            "product": "zywall_110"
        },
        {
            "vendor": "zyxel",
            "product": "zywall_1100"
        },
        {
            "vendor": "zyxel",
            "product": "zywall_310"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://businessforum.zyxel.com/categories/security-news-and-release",
        "https://www.zyxel.com/support/Zyxel-security-advisory-for-buffer-overflow-vulnerability.shtml",
        "https://businessforum.zyxel.com/categories/security-news-and-release",
        "https://www.zyxel.com/support/Zyxel-security-advisory-for-buffer-overflow-vulnerability.shtml"
    ]
}