{
    "id": "CVE-2016-9566",
    "published": "2016-12-15 22:59:00",
    "last_modified": "2026-06-17 00:56:15",
    "cvss_score": "7.8",
    "cvss_severity": "HIGH",
    "cvss_version": "3.0",
    "cvss_vector": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-59",
    "description": "base/logging.c in Nagios Core before 4.2.4 allows local users with access to an account in the nagios group to gain root privileges via a symlink attack on the log file.  NOTE: this can be leveraged by remote attackers using CVE-2016-9565.",
    "epss_score": "0.04885",
    "epss_percentile": "0.91824",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-10-06 18:17:14",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "nagios",
            "product": "nagios"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "40921",
            "title": "Nagios < 4.2.4 - Local Privilege Escalation",
            "date": "2016-12-15",
            "url": "https://www.exploit-db.com/exploits/40921"
        }
    ],
    "refs_list": [
        "http://rhn.redhat.com/errata/RHSA-2017-0211.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0212.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0213.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0214.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0258.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0259.html",
        "http://seclists.org/fulldisclosure/2016/Dec/58",
        "http://www.securityfocus.com/bid/94919",
        "http://www.securitytracker.com/id/1037487",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1402869",
        "https://github.com/NagiosEnterprises/nagioscore/commit/c29557dec91eba2306f5fb11b8da4474ba63f8c4",
        "https://legalhackers.com/advisories/Nagios-Exploit-Root-PrivEsc-CVE-2016-9566.html",
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00014.html",
        "https://security.gentoo.org/glsa/201612-51",
        "https://security.gentoo.org/glsa/201702-26",
        "https://security.gentoo.org/glsa/201710-20",
        "https://www.exploit-db.com/exploits/40921/",
        "https://www.nagios.org/projects/nagios-core/history/4x/",
        "http://rhn.redhat.com/errata/RHSA-2017-0211.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0212.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0213.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0214.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0258.html",
        "http://rhn.redhat.com/errata/RHSA-2017-0259.html",
        "http://seclists.org/fulldisclosure/2016/Dec/58"
    ]
}