{"cve":"CVE-2016-4957","nvd":{"published":"2016-07-05T01:59:04.283","modified":"2026-06-17T00:48:30.253","status":"Modified","description":"ntpd in NTP before 4.2.8p8 allows remote attackers to cause a denial of service (daemon crash) via a crypto-NAK packet.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2016-1547.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476"],"references":["http://bugs.ntp.org/3046","http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html","http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html","http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html","http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html"],"products":["novell:suse_manager","ntp:ntp","opensuse:leap","opensuse:opensuse","oracle:solaris","suse:linux_enterprise_desktop","suse:linux_enterprise_server","suse:manager_proxy","suse:openstack_cloud"],"source":"nvd","synced_at":"2026-10-19T20:38:51.654415212+00:00"},"epss":{"cve":"CVE-2016-4957","score":0.44936,"percentile":0.98779,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}