Is CVE-2016-6380 being actively exploited?

CVE-2016-6380 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2016-6380?

CVE-2016-6380 has a CVSS 3.0 base score of 8.1 (HIGH).

CVE-2016-6380

HIGH · CVSS 8.1EPSS 3.0%EU EUVD

The DNS forwarder in Cisco IOS 12.0 through 12.4 and 15.0 through 15.6 and IOS XE 3.1 through 3.15 allows remote attackers to obtain sensitive information from process memory or cause a denial of service (data corruption or device reload) via a crafted DNS response, aka Bug ID CSCup90532.

Key facts

CVSS score: 8.1 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-20
EPSS score: 3.0% (87th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2016-7303)
Published: October 5, 2016
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2016-7303 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

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and 950 more…

Certified products that may be affected

7 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Cisco Catalyst 3K/4K Wired Access Switches running IOS-XE 3.8.0E - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10688-2016 - archived
Cisco Aggregation Services Router (ASR) 1000 Series, IOS XE 3.13 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10609-2015 - archived
Cisco Integrated Services Router 4400 Series (ISR-4400), IOS XE 3.13.0 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10600-2015 - archived
Cisco Catalyst 3650, 3850, 4500E (Sup7E, Sup7LE, Sup8E), 4500X, 4500XF running IOS-XE 3.6.1S - Cisco Systems, Inc. - Common Criteria CCEVS-VR-VID-10607-2014 - archived
Cisco Catalyst 3850 Series Switches running IOS-XE 3.6.0E and Catalyst 6500 Series Switches running IOS 15.1(2)SY3 - Cisco Systems, Inc. - Common Criteria NSCIB-CC-14-39582-CR - archived

See all 7 in the Security Certifications Explorer.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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