{
    "id": "CVE-2020-10071",
    "published": "2020-06-05 18:15:13",
    "last_modified": "2026-06-17 02:47:17",
    "cvss_score": "9.0",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H",
    "cwe": "CWE-120",
    "description": "The Zephyr MQTT parsing code performs insufficient checking of the length field on publish messages, allowing a buffer overflow and potentially remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.",
    "epss_score": "0.03395",
    "epss_percentile": "0.88504",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-09 18:17:24",
    "priority": {
        "rank": 3,
        "label": "In your normal cycle",
        "why": "Critical by CVSS (9), but no sign of active exploitation."
    },
    "products": [
        {
            "vendor": "zephyrproject",
            "product": "zephyr"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071",
        "https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082",
        "https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment",
        "https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86",
        "https://docs.zephyrproject.org/latest/security/vulnerabilities.html#cve-2020-10071",
        "https://github.com/zephyrproject-rtos/zephyr/pull/23821/commits/989c4713ba429aa5105fe476b4d629718f3e6082",
        "https://research.nccgroup.com/2020/05/26/research-report-zephyr-and-mcuboot-security-assessment",
        "https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-86"
    ]
}