{
    "id": "CVE-2020-8794",
    "published": "2020-02-25 17:15:13",
    "last_modified": "2026-06-17 03:26:57",
    "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-125",
    "description": "OpenSMTPD before 6.6.4 allows remote code execution because of an out-of-bounds read in mta_io in mta_session.c for multi-line replies. Although this vulnerability affects the client side of OpenSMTPD, it is possible to attack a server because the server code launches the client code during bounce handling.",
    "epss_score": "0.88900",
    "epss_percentile": "0.99775",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:25:29",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "fedoraproject",
            "product": "fedora"
        },
        {
            "vendor": "opensmtpd",
            "product": "opensmtpd"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "48185",
            "title": "OpenSMTPD - OOB Read Local Privilege Escalation (Metasploit)",
            "date": "2020-03-09",
            "url": "https://www.exploit-db.com/exploits/48185"
        },
        {
            "source": "exploit-db",
            "ref_id": "48140",
            "title": "OpenSMTPD < 6.6.3p1 - Local Privilege Escalation + Remote Code Execution",
            "date": "2020-02-26",
            "url": "https://www.exploit-db.com/exploits/48140"
        }
    ],
    "refs_list": [
        "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html",
        "http://seclists.org/fulldisclosure/2020/Feb/32",
        "http://www.openwall.com/lists/oss-security/2020/02/26/1",
        "http://www.openwall.com/lists/oss-security/2020/03/01/1",
        "http://www.openwall.com/lists/oss-security/2020/03/01/2",
        "http://www.openwall.com/lists/oss-security/2021/05/04/7",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/",
        "https://usn.ubuntu.com/4294-1/",
        "https://www.debian.org/security/2020/dsa-4634",
        "https://www.openbsd.org/security.html",
        "https://www.openwall.com/lists/oss-security/2020/02/24/5",
        "http://packetstormsecurity.com/files/156633/OpenSMTPD-Out-Of-Bounds-Read-Local-Privilege-Escalation.html",
        "http://seclists.org/fulldisclosure/2020/Feb/32",
        "http://www.openwall.com/lists/oss-security/2020/02/26/1",
        "http://www.openwall.com/lists/oss-security/2020/03/01/1",
        "http://www.openwall.com/lists/oss-security/2020/03/01/2",
        "http://www.openwall.com/lists/oss-security/2021/05/04/7",
        "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OPH4QU4DNVHA7ACFXMYFCEP5PSXXPN4E/",
        "https://usn.ubuntu.com/4294-1/",
        "https://www.debian.org/security/2020/dsa-4634",
        "https://www.openbsd.org/security.html",
        "https://www.openwall.com/lists/oss-security/2020/02/24/5"
    ]
}