{
    "id": "CVE-2021-35393",
    "published": "2021-08-16 12:15:07",
    "last_modified": "2026-06-17 03:57:29",
    "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": "Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a stack buffer overflow vulnerability that is present due to unsafe parsing of the UPnP SUBSCRIBE/UNSUBSCRIBE Callback header. Successful exploitation of this vulnerability allows remote unauthenticated attackers to gain arbitrary code execution on the affected device.",
    "epss_score": "0.70334",
    "epss_percentile": "0.99367",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-09-26 18:48:30",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 70.3% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "realtek",
            "product": "rtl819x_jungle_software_development_kit"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain",
        "https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en",
        "https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf",
        "https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain",
        "https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en",
        "https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf"
    ]
}