{"cve":"CVE-2016-1550","nvd":{"published":"2017-01-06T21:59:00.413","modified":"2026-06-17T00:42:09.063","status":"Modified","description":"An exploitable vulnerability exists in the message authentication functionality of libntp in ntp 4.2.8p4 and NTPSec a5fb34b9cc89b92a8fef2f459004865c93bb7f92. An attacker can send a series of crafted messages to attempt to recover the message digest key.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-200"],"references":["http://lists.fedoraproject.org/pipermail/package-announce/2016-May/183647.html","http://lists.fedoraproject.org/pipermail/package-announce/2016-May/184669.html","http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00034.html","http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00037.html","http://lists.opensuse.org/opensuse-security-announce/2016-05/msg00052.html"],"products":["ntp:ntp"],"source":"nvd","synced_at":"2026-10-19T20:41:25.729257544+00:00"},"epss":{"cve":"CVE-2016-1550","score":0.03604,"percentile":0.89469,"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."]}