CVE-2016-1547: An off-path attacker can cause a preemptible client association to be demobilized in NTP 4.2.8p4 and earlie...

Security readout for executives and security teams

This flaw lets an off-path attacker disrupt how vulnerable NTP clients stay associated with a time server. The business issue is loss or degradation of trusted time synchronization, which can affect logging, authentication, monitoring, and time-sensitive operations. The bundle does not show code execution or data theft. Exposure is most likely on systems running vulnerable NTP or NTPSec client implementations that use preemptible associations. Distribution and vendor advisories indicate downstream products packaged or shipped affected NTP components. Treat this as a reliability and trust issue for time infrastructure. It is not presented as active exploitation or remote code execution, but disruption of time sync can undermine logs, access controls, and operations. Mitigation focus: Apply applicable NTP security updates from your operating system or device vendor.; Check NTP Project, NTPSec, and platform advisories for fixed versions.; Prioritize internet-exposed or operationally critical time clients..

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.