{
    "id": "CVE-2020-24336",
    "published": "2020-12-11 23:15:13",
    "last_modified": "2026-06-17 03:05:23",
    "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-120",
    "description": "An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain name answers in ip64-dns64.c doesn't verify whether the address in the answer's length is sane. Therefore, when copying an address of an arbitrary length, a buffer overflow can occur. This bug can be exploited whenever NAT64 is enabled.",
    "epss_score": "0.59089",
    "epss_percentile": "0.99090",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-02 18:17:26",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 59.1% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "contiki-ng",
            "product": "contiki-ng"
        },
        {
            "vendor": "contiki-os",
            "product": "contiki"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01",
        "https://www.kb.cert.org/vuls/id/815128",
        "https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01",
        "https://www.kb.cert.org/vuls/id/815128"
    ]
}