{
    "id": "CVE-2018-7846",
    "published": "2019-05-22 20:29:01",
    "last_modified": "2026-06-17 02:03:51",
    "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-668",
    "description": "A CWE-501: Trust Boundary Violation vulnerability on connection to the Controller exists in all versions of the Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium which could cause unauthorized access by conducting a brute force attack on Modbus protocol to the controller.",
    "epss_score": "0.29575",
    "epss_percentile": "0.98142",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:22",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 29.6% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "schneider-electric",
            "product": "modicon_m340"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_m340_firmware"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_m580"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_m580_firmware"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_premium"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_premium_firmware"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_quantum"
        },
        {
            "vendor": "schneider-electric",
            "product": "modicon_quantum_firmware"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/",
        "https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735",
        "https://www.schneider-electric.com/en/download/document/SEVD-2019-134-11/",
        "https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0735"
    ]
}