CVE-2016-7426: n/a vulnerability

CVE-2016-7426: NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all as...

NTP before 4.2.8p9 rate limits responses received from the configured sources when rate limiting for all associations is enabled, which allows remote attackers to cause a denial of service (prevent responses from the sources) by sending responses with a spoofed source address.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 6, 2024, 01:57 UTC (UTC+00:00)

Security readout for executives and security teams

This flaw can let a remote attacker disrupt time synchronization on systems running NTP before 4.2.8p9 when a specific rate-limiting mode is enabled. Business impact is denial of reliable time, which can affect logging, authentication, monitoring, and scheduled operations. Exposure is most likely on systems running NTP before 4.2.8p9 with all-association rate limiting enabled, especially internet-facing or untrusted-network NTP deployments. Treat as a targeted infrastructure reliability risk. Patch during normal vulnerability cycles, faster for externally reachable NTP services or environments where time drift breaks security controls. Mitigation focus: Upgrade NTP to 4.2.8p9 or a vendor-fixed package.; Review Ubuntu, Red Hat, FreeBSD, HPE, and appliance advisories for packaged fixes.; Inventory appliances and network devices that bundle NTP..

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.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jan 13, 2017, 16:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03706en_usCVE reference · x_refsource_CONFIRM
USN-3707-2CVE reference · vendor-advisory, x_refsource_UBUNTU
VU#633847CVE reference · third-party-advisory, x_refsource_CERT-VN
https://bto.bluecoat.com/security-advisory/sa139CVE reference · x_refsource_CONFIRM
FreeBSD-SA-16:39CVE reference · vendor-advisory, x_refsource_FREEBSD

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

No CWE listed

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