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CVE-2016-1866

23
FAUCET Score

CVE-2016-1866 describes a critical vulnerability in Salt 2015.8.x before version 2015.8.4, affecting products like openSUSE and SaltStack. This flaw allows man-in-the-middle (MITM) attackers to execute arbitrary code on Salt minions by injecting packets into the data stream due to improper handling of clear messages. With a CVSS score of 8.1 (HIGH), this vulnerability presents a significant risk, as it requires high attack complexity but can lead to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2015.8.0CPE matchmatch criteria
cpe:2.3:a:saltstack:salt:2015.8.0:*:*:*:*:*:*:*
2015.8.1CPE matchmatch criteria
cpe:2.3:a:saltstack:salt:2015.8.1:*:*:*:*:*:*:*
2015.8.2CPE matchmatch criteria
cpe:2.3:a:saltstack:salt:2015.8.2:*:*:*:*:*:*:*
2015.8.3CPE matchmatch criteria
cpe:2.3:a:saltstack:salt:2015.8.3:*:*:*:*:*:*:*
42.1CPE matchmatch criteria
cpe:2.3:o:opensuse:leap:42.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

8.1HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.2
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.52%
Probability of exploitation in next 30 days
EPSS Percentile
71.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0152 is in the 30th percentile among its peer group of 8,920 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 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 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

pippatch availablevia ghsa
Product: saltFixed in: 2015.8.4

Vendor Advisories (2)

pipGHSA-vqh4-crjf-jjxxhigh

Salt Improper Access Control

May 14, 2022
redhatCVE-2016-1866Moderate

salt: Improper handling of clear messages on the minion

Jan 25, 2016

References

lists.opensuse.org / opensuse-updates/2016-03/msg00034.html
docs.saltstack.com / en/latest/topics/releases/2015.8.4.html
Vendor Advisory