Is CVE-2016-1549 in the CISA KEV catalog?

No. CVE-2016-1549 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-1549?

CVE-2016-1549 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2016-1549?

CVE-2016-1549 has an EPSS score of 3.15% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-1549?

Upgrade ntp on debian 11 to 1:4.2.8p7+dfsg-1 or later.

CVE & CISA-KEV Catalog

CVE-2016-1549

MEDIUMEPSS 86th pctl

6.5

CVSS v3

NVD

Description

A malicious authenticated peer can create arbitrarily-many ephemeral associations in order to win the clock selection algorithm in ntpd in NTP 4.2.8p4 and earlier and NTPsec 3e160db8dc248a0bcb053b56a80167dc742d2b74 and a5fb34b9cc89b92a8fef2f459004865c93bb7f92 and modify a victim's clock.

CWE-19

How to fix

Remediation Available

ntpDebian

Fixed in:1:4.2.8p7+dfsg-1CVE-2016-1549

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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

3.15%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Mitigation1

talosintelligence.com

Other references8

Embed a live status badge for CVE-2016-1549

Markdown

[![CVE-2016-1549](https://tridentstack.com/cve/badge/CVE-2016-1549.svg)](https://tridentstack.com/cve/CVE-2016-1549)

HTML

<a href="https://tridentstack.com/cve/CVE-2016-1549"><img src="https://tridentstack.com/cve/badge/CVE-2016-1549.svg" alt="CVE-2016-1549"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2026-05-06.