How severe is CVE-2015-4166?

CVE-2015-4166 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-4166 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-4166?

CVE-2015-4166 affects Cloudera Key Trustee Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-4166?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2015-4166 published?

CVE-2015-4166 was published on 2017-03-23 and last updated on 2026-06-17.

CVE-2015-4166

CVE-2015-4166 is a critical-severity vulnerability in Cloudera Key Trustee Server with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-320.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 1% (49th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-320
Affected product: Cloudera Key Trustee Server
Published: 2017-03-23
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2015-4166?: CVE-2015-4166 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-4166 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (49th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-4166?: CVE-2015-4166 affects Cloudera Key Trustee Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-4166?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2015-4166 published?: CVE-2015-4166 was published on 2017-03-23 and last updated on 2026-06-17.

References

https://www.cloudera.com/documentation/other/security-bulletins/topics/csb_topic_1.html#concept_jpc_mwm_js

Affected products (1)

cpe:2.3:a:cloudera:key_trustee_server:*:*:*:*:*:*:*:*

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