CVE-2016-7433: NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers t...

Security readout for executives and security teams

This flaw affects NTP before 4.2.8p9 and concerns incorrect initial time synchronization calculations. The public record says remote attackers may cause an unspecified impact, but does not define the consequence or attack method. Treat it as a patching and exposure review item for systems that depend on reliable time. Likely exposure is systems running ntpd from NTP versions before 4.2.8p9, including vendor-packaged NTP on platforms covered by listed advisories such as Red Hat, FreeBSD, HPE, and others. Internet-reachable NTP services deserve priority review. Handle through normal vulnerability management unless business-critical or internet-facing NTP assets are affected. The impact is not well specified, but reliable time supports authentication, logging, certificates, and investigations, so stale NTP versions should not remain unattended. Mitigation focus: Identify systems running ntpd from NTP versions earlier than 4.2.8p9.; Apply vendor-provided NTP updates or upgrade to NTP 4.2.8p9 or later.; Prioritize externally reachable NTP servers and systems where time integrity is operationally important..

Prepared

Jun 13, 2026, 12:51 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.