{
    "id": "CVE-2015-7853",
    "published": "2017-08-07 20:29:00",
    "last_modified": "2026-06-17 00:33:15",
    "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": "The datalen parameter in the refclock driver in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to execute arbitrary code or cause a denial of service (crash) via a negative input value.",
    "epss_score": "0.11781",
    "epss_percentile": "0.95966",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-10-03 18:17:15",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 11.8% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "netapp",
            "product": "clustered_data_ontap"
        },
        {
            "vendor": "netapp",
            "product": "data_ontap"
        },
        {
            "vendor": "netapp",
            "product": "oncommand_balance"
        },
        {
            "vendor": "netapp",
            "product": "oncommand_performance_manager"
        },
        {
            "vendor": "netapp",
            "product": "oncommand_unified_manager"
        },
        {
            "vendor": "ntp",
            "product": "ntp"
        }
    ],
    "kev_detail": null,
    "exploits": [],
    "refs_list": [
        "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00020.html",
        "http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00048.html",
        "http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html",
        "http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html",
        "http://lists.opensuse.org/opensuse-updates/2015-11/msg00093.html",
        "http://lists.opensuse.org/opensuse-updates/2016-05/msg00114.html",
        "http://packetstormsecurity.com/files/134082/FreeBSD-Security-Advisory-ntp-Authentication-Bypass.html",
        "http://packetstormsecurity.com/files/134137/Slackware-Security-Advisory-ntp-Updates.html",
        "http://support.ntp.org/bin/view/Main/NtpBug2920",
        "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151021-ntp",
        "http://www.securityfocus.com/archive/1/536737/100/0/threaded",
        "http://www.securityfocus.com/archive/1/536760/100/0/threaded",
        "http://www.securityfocus.com/archive/1/536796/100/0/threaded",
        "http://www.securityfocus.com/archive/1/536833/100/0/threaded",
        "http://www.securityfocus.com/archive/1/archive/1/536737/100/100/threaded",
        "http://www.securityfocus.com/archive/1/archive/1/536760/100/100/threaded",
        "http://www.securityfocus.com/archive/1/archive/1/536796/100/100/threaded",
        "http://www.securityfocus.com/archive/1/archive/1/536833/100/100/threaded",
        "http://www.securityfocus.com/bid/77273",
        "http://www.securitytracker.com/id/1033951",
        "http://www.talosintel.com/vulnerability-reports/",
        "http://www.ubuntu.com/usn/USN-2783-1",
        "https://bto.bluecoat.com/security-advisory/sa103",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1274262",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf"
    ]
}