How severe is CVE-2016-6364?

CVE-2016-6364 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2016-6364 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-6364?

CVE-2016-6364 affects Cisco Unified Communications Manager. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2016-6364?

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

When was CVE-2016-6364 published?

CVE-2016-6364 was published on 2016-08-23 and last updated on 2026-06-17.

CVE-2016-6364

CVE-2016-6364 is a high-severity vulnerability in Cisco Unified Communications Manager with a CVSS 3.x base score of 7.5. 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-200.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-200
Affected product: Cisco Unified Communications Manager
Published: 2016-08-23
Last modified: 2026-06-17

Description

The User Data Services (UDS) API implementation in Cisco Unified Communications Manager 11.5 allows remote attackers to bypass intended access restrictions and obtain sensitive information via unspecified API calls, aka Bug ID CSCux67855.

Frequently asked questions

What is CVE-2016-6364?: The User Data Services (UDS) API implementation in Cisco Unified Communications Manager 11.5 allows remote attackers to bypass intended access restrictions and obtain sensitive information via unspecified API calls, aka Bug ID CSCux67855.
How severe is CVE-2016-6364?: CVE-2016-6364 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2016-6364 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-6364?: CVE-2016-6364 affects Cisco Unified Communications Manager. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2016-6364?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2016-6364 published?: CVE-2016-6364 was published on 2016-08-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:unified_communications_manager:11.5.0:*:*:*:*:*:*:*

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