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CVE-2016-9686

18
FAUCET Score

CVE-2016-9686 describes a vulnerability in the Puppet Communications Protocol (PCP) Broker where it fails to properly validate message header sizes, affecting Puppet Enterprise. This flaw allows an unauthenticated attacker to remotely crash the PCP Broker, leading to a denial of service by preventing command delivery to agents. Rated as MEDIUM severity (CVSS 5.3), there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2016.4.0, < 2016.4.3CPE matchmatch criteria
cpe:2.3:a:puppet:puppet_enterprise:*:*:*:*:*:*:*:*
2016.5.1CPE matchmatch criteria
cpe:2.3:a:puppet:puppet_enterprise:2016.5.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.3MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.27%
Probability of exploitation in next 30 days
EPSS Percentile
66.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0127 is in the 46th percentile among its peer group of 23,690 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

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

puppet.com / security/cve/cve-2016-9686
Vendor Advisory