Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2017-6451

26
FAUCET Score

CVE-2017-6451 describes an out-of-bounds memory write vulnerability in the mx4200_send function of the legacy MX4200 refclock in NTP versions prior to 4.2.8p10 and 4.3.x prior to 4.3.94. This flaw, rated High severity with a CVSS score of 7.8, allows a local attacker to execute arbitrary code due to improper handling of snprintf's return value. Despite its severity, there is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.2.8CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.2.8:p9:*:*:*:*:*:*
4.3.0CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.3.0:*:*:*:*:*:*:*
4.3.1CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.3.1:*:*:*:*:*:*:*
4.3.2CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.3.2:*:*:*:*:*:*:*
4.3.3CPE matchmatch criteria
cpe:2.3:a:ntp:ntp:4.3.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 79th percentile among its peer group of 17,061 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2017-6451Low

ntp: Improper use of snprintf() in mx4200_send()

Mar 21, 2017

References

support.apple.com / HT208144
support.hpe.com / hpsc/doc/public/display
support.ntp.org / bin/view/Main/NtpBug3378
PatchVendor Advisory
support.ntp.org / bin/view/Main/SecurityNotice
Vendor Advisory
securityfocus.com / bid/97058
Third Party AdvisoryVDB Entry
securitytracker.com / id/1038123
Third Party AdvisoryVDB Entry
securitytracker.com / id/1039427