What is CVE-2015-4166?

CVE-2015-4166 is a critical-severity vulnerability in Cloudera Key Trustee Server, classified under CWE-320. CVSS score: 9.8/10. Published 2017-03-23.

How severe is CVE-2015-4166?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Cloudera Key Trustee Server

CVE-2015-4166

Cloudera Key Trustee Server before 5.4.3 does not store keys synchronously, which might allow attackers to have unspecified impact via vectors related to loss of an encryption key.

Published 2017-03-23 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 51.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Cloudera Key Trustee Server

Weakness classification (CWE)

CWE-320

References

www.cloudera.com/documentation/other/security-bulletins/topics/csb_topic_1.html (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2015-4166?: CVE-2015-4166 is a critical-severity vulnerability in Cloudera Key Trustee Server, classified under CWE-320. CVSS score: 9.8/10. Published 2017-03-23.
How severe is CVE-2015-4166?: Critical severity. CVSS v3 base score is 9.8 out of 10.