{
    "id": "CVE-2017-16943",
    "published": "2017-11-25 17:29:00",
    "last_modified": "2026-06-17 01:10:11",
    "cvss_score": "9.8",
    "cvss_severity": "CRITICAL",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-416",
    "description": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands.",
    "epss_score": "0.46705",
    "epss_percentile": "0.98791",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-02 18:17:18",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 46.7% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "exim",
            "product": "exim"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://openwall.com/lists/oss-security/2017/11/25/1",
        "http://openwall.com/lists/oss-security/2017/11/25/2",
        "http://openwall.com/lists/oss-security/2017/11/25/3",
        "http://www.openwall.com/lists/oss-security/2021/05/04/7",
        "http://www.securitytracker.com/id/1039872",
        "https://bugs.exim.org/show_bug.cgi?id=2199",
        "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde",
        "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4",
        "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944",
        "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html",
        "https://www.debian.org/security/2017/dsa-4053",
        "http://openwall.com/lists/oss-security/2017/11/25/1",
        "http://openwall.com/lists/oss-security/2017/11/25/2",
        "http://openwall.com/lists/oss-security/2017/11/25/3",
        "http://www.openwall.com/lists/oss-security/2021/05/04/7",
        "http://www.securitytracker.com/id/1039872",
        "https://bugs.exim.org/show_bug.cgi?id=2199",
        "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde",
        "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4",
        "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944",
        "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html",
        "https://www.debian.org/security/2017/dsa-4053"
    ]
}