{
    "id": "CVE-2015-7871",
    "published": "2017-08-07 20:29:00",
    "last_modified": "2026-06-17 00:33:17",
    "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-287",
    "description": "Crypto-NAK packets in ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before 4.3.77 allows remote attackers to bypass authentication.",
    "epss_score": "0.81762",
    "epss_percentile": "0.99636",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 0,
    "updated_at": "2026-09-27 18:17:15",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "EPSS 81.8% — above the 10% action threshold."
    },
    "products": [
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "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://support.ntp.org/bin/view/Main/NtpBug2941",
        "http://www.debian.org/security/2015/dsa-3388",
        "http://www.securityfocus.com/bid/77287",
        "http://www.securitytracker.com/id/1033951",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1274265",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf",
        "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839",
        "https://security.gentoo.org/glsa/201604-03",
        "https://security.gentoo.org/glsa/201607-15",
        "https://security.netapp.com/advisory/ntap-20171004-0001/",
        "http://support.ntp.org/bin/view/Main/NtpBug2941",
        "http://www.debian.org/security/2015/dsa-3388",
        "http://www.securityfocus.com/bid/77287",
        "http://www.securitytracker.com/id/1033951",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1274265",
        "https://cert-portal.siemens.com/productcert/pdf/ssa-497656.pdf",
        "https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05270839",
        "https://security.gentoo.org/glsa/201604-03",
        "https://security.gentoo.org/glsa/201607-15",
        "https://security.netapp.com/advisory/ntap-20171004-0001/"
    ]
}