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-2016-4467

22
FAUCET Score

CVE-2016-4467 is a medium-severity vulnerability affecting the Apache Qpid Proton library (before version 0.13.1) on Windows, specifically its C client and C-based client bindings. It allows man-in-the-middle (MITM) attackers to spoof servers by presenting any valid X.509 certificate due to improper hostname verification when using the SChannel security layer. The attack requires high complexity but can lead to a complete loss of integrity (I:H). There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.8.0CPE matchmatch criteria
cpe:2.3:a:apache:qpid_proton:0.8.0:*:*:*:*:*:*:*
0.9.0CPE matchmatch criteria
cpe:2.3:a:apache:qpid_proton:0.9.0:*:*:*:*:*:*:*
0.9.1CPE matchmatch criteria
cpe:2.3:a:apache:qpid_proton:0.9.1:*:*:*:*:*:*:*
0.10.0CPE matchmatch criteria
cpe:2.3:a:apache:qpid_proton:0.10.0:*:*:*:*:*:*:*
0.11.0CPE matchmatch criteria
cpe:2.3:a:apache:qpid_proton:0.11.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.9MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.2
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.62%
Probability of exploitation in next 30 days
EPSS Percentile
73.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0162 is in the 50th percentile among its peer group of 19,954 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

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

Remediation

Remediation records are not available for this CVE.

References

lists.apache.org / thread.html/914424e4d798a340f523b6169aaf39b626971d9bb00fcdeb1d5d6c0d%40%3Ccommits.qpid.apache.org%3E
openwall.com / lists/oss-security/2016/07/15/3
Mailing ListThird Party Advisory
securityfocus.com / bid/91788
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036316
Third Party AdvisoryVDB Entry