{
    "id": "CVE-2021-27691",
    "published": "2021-04-16 00:15:12",
    "last_modified": "2026-06-17 03:45:20",
    "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-78",
    "description": "Command Injection in Tenda G0 routers with firmware versions v15.11.0.6(9039)_CN and v15.11.0.5(5876)_CN , and Tenda G1 and G3 routers with firmware versions v15.11.0.17(9502)_CN or v15.11.0.16(9024)_CN allows remote attackers to execute arbitrary OS commands via a crafted action/setDebugCfg request. This occurs because the \"formSetDebugCfg\" function executes glibc's system function with untrusted input.",
    "epss_score": "0.25183",
    "epss_percentile": "0.97879",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:29",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 25.2% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "tendacn",
            "product": "g0"
        },
        {
            "vendor": "tendacn",
            "product": "g0_firmware"
        },
        {
            "vendor": "tendacn",
            "product": "g1"
        },
        {
            "vendor": "tendacn",
            "product": "g1_firmware"
        },
        {
            "vendor": "tendacn",
            "product": "g3"
        },
        {
            "vendor": "tendacn",
            "product": "g3_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/rkhTCGzMd",
        "https://hackmd.io/%40aZYpdinUS2SD-yhAeHwOkw/rkhTCGzMd"
    ]
}