Is CVE-2016-7433 in the CISA KEV catalog?

No. CVE-2016-7433 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-7433?

CVE-2016-7433 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2016-7433?

CVE-2016-7433 has an EPSS score of 9.76% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-7433?

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-2016-7433

MEDIUMEPSS 95th pctl

5.3

CVSS v3

NVD

Description

NTP before 4.2.8p9 does not properly perform the initial sync calculations, which allows remote attackers to unspecified impact via unknown vectors, related to a "root distance that did not include the peer dispersion."

CWE-682

How to fix

Remediation Available

ntpDebian

Fixed in:1:4.2.8p9+dfsg-1CVE-2016-7433

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

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

AvailabilityLow

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Exploit Intelligence

9.76%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

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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.