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CVE-2015-4166

24
FAUCET Score

CVE-2015-4166 describes a critical vulnerability in Cloudera Key Trustee Server versions prior to 5.4.3, where the system fails to synchronously store encryption keys. This flaw could lead to a complete loss of encryption keys, resulting in severe impacts on confidentiality, integrity, and availability. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without user interaction. Despite its critical severity, there is no known public exploit code, active exploitation, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.4.2CPE matchmatch criteria
cpe:2.3:a:cloudera:key_trustee_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 33rd percentile among its peer group of 36,829 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 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

Remediation records are not available for this CVE.

References

cloudera.com / documentation/other/security-bulletins/topics/csb_topic_1.html
MitigationVendor Advisory