Is CVE-2016-7426 in the CISA KEV catalog?

No. CVE-2016-7426 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-7426?

CVE-2016-7426 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2016-7426?

CVE-2016-7426 has an EPSS score of 12.47% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-7426?

Upgrade ntp on debian 11 to 1:4.2.8p9+dfsg-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2016-7426

HIGHEPSS 96th pctl

7.5

CVSS v3

NVD

Description

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.

CWE-400Resource Exhaustion

How to fix

Remediation Available

ntpDebian

Fixed in:1:4.2.8p9+dfsg-1CVE-2016-7426

ntpUbuntu

Fixed in:1:4.2.6.p5+dfsg-3ubuntu2.14.04.11USN-3349-1

Fixed in:1:4.2.8p4+dfsg-3ubuntu5.5USN-3349-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

12.47%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory9

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	High	7.5	88%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-13.