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CVE-2016-9310

23
FAUCET Score

CVE-2016-9310 is a medium-severity vulnerability affecting NTP before version 4.2.8p9. It allows remote attackers to manipulate trap settings via crafted control mode packets due to a flaw in the control mode (mode 6) functionality. This vulnerability has a CVSS score of 6.5, indicating a network-based attack with low complexity, potentially leading to limited confidentiality and availability impacts. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered some community discussion and media coverage, suggesting awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:*:p8:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
2.5
CvssVersion
3.0

Exploit Intelligence

EPSS Score
11.16%
Probability of exploitation in next 30 days
EPSS Percentile
95.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.1116 is in the 95th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (5)

libreofficepatch availablevia llm_extracted
Fixed in: OpenVPN Access Server bundled Clients Package v14
View patch
openvpnpatch availablevia llm_extracted
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: ntp-0:4.2.6p5-10.el6_8.2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ntp-0:4.2.6p5-25.el7_3.1
View patch
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: ntp

Vendor Advisories (3)

redhatCVE-2016-9310Moderate

ntp: Mode 6 unauthenticated trap information disclosure and DDoS vector

Nov 21, 2016
openvpnllm-openvpn-c40d9ff2db99dfde

NTP Vulnerability Affecting Underlying Operating Systems

libreofficellm-libreoffice-c1c1b46244aa33a0

NTP Vulnerabilities

References

nwtime.org / ntp428p9_release
Release NotesVendor Advisory
rhn.redhat.com / errata/RHSA-2017-0252.html
bto.bluecoat.com / security-advisory/sa139
h20566.www2.hpe.com / hpsc/doc/public/display
security.freebsd.org / advisories/FreeBSD-SA-16:39.ntp.asc
support.hpe.com / hpsc/doc/public/display
support.ntp.org / bin/view/Main/NtpBug3118
Issue TrackingMitigationVendor Advisory
support.ntp.org / bin/view/Main/SecurityNotice
Vendor Advisory
usn.ubuntu.com / 3707-2
kb.cert.org / vuls/id/633847
Third Party AdvisoryUS Government Resource
securityfocus.com / bid/94452
securitytracker.com / id/1037354