How severe is CVE-2016-1466?

CVE-2016-1466 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 none, integrity none, and availability high.

Is CVE-2016-1466 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-1466?

CVE-2016-1466 primarily affects Cisco Unified Communications Manager Im And Presence Service. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-1466?

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-2016-1466 published?

CVE-2016-1466 was published on 2016-08-08 and last updated on 2026-06-17.

CVE-2016-1466

CVE-2016-1466 is a high-severity vulnerability in Cisco Unified Communications Manager Im And Presence Service 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-399.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Cisco Unified Communications Manager Im And Presence Service
Published: 2016-08-08
Last modified: 2026-06-17

Description

Cisco Unified Communications Manager IM and Presence Service 9.1(1) SU6, 9.1(1) SU6a, 9.1(1) SU7, 10.5(2) SU2, 10.5(2) SU2a, 11.0(1) SU1, and 11.5(1) allows remote attackers to cause a denial of service (sipd process restart) via crafted headers in a SIP packet, aka Bug ID CSCva39072.

Frequently asked questions

What is CVE-2016-1466?: Cisco Unified Communications Manager IM and Presence Service 9.1(1) SU6, 9.1(1) SU6a, 9.1(1) SU7, 10.5(2) SU2, 10.5(2) SU2a, 11.0(1) SU1, and 11.5(1) allows remote attackers to cause a denial of service (sipd process restart) via crafted headers in a SIP packet, aka Bug ID CSCva39072.
How severe is CVE-2016-1466?: CVE-2016-1466 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 none, integrity none, and availability high.
Is CVE-2016-1466 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-1466?: CVE-2016-1466 primarily affects Cisco Unified Communications Manager Im And Presence Service. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-1466?: 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-2016-1466 published?: CVE-2016-1466 was published on 2016-08-08 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:9.1\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:10.5\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:11.0\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:unified_communications_manager_im_and_presence_service:11.5\(1\):*:*:*:*:*:*:*

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