Is CVE-2016-1409 being actively exploited?

CVE-2016-1409 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2016-1409?

CVE-2016-1409 has a CVSS 3.0 base score of 7.5 (HIGH).

CVE-2016-1409

HIGH · CVSS 7.5EPSS 3.9%EU EUVD

The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in Cisco IOS XE 2.1 through 3.17S, IOS XR 2.0.0 through 5.3.2, and NX-OS allows remote attackers to cause a denial of service (packet-processing outage) via crafted ND messages, aka Bug ID CSCuz66542, as exploited in the wild in May 2016.

Key facts

CVSS score: 7.5 (v3.0)
Severity: HIGH
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-20
EPSS score: 3.9% (90th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2016-2508)
Published: May 29, 2016
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2016-2508 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

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and 950 more…

Certified products that may be affected

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

Cisco Nexus 9000 Switch Series with ACI mode, APIC 6.1(2g) and NX-OS software-ACI 16.1(2g) - Cisco Systems, Inc. - Common Criteria NSCIB-CC-2400067-01-CR - active
Cisco Nexus 5600 Series Switches with 2000 Series Fabric Extenders running NX-OS 7.2(1)N1(1) - Cisco Systems, Inc. - Common Criteria NSCIB-CC-15-77333-CR - archived
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

See all 12 in the Security Certifications Explorer.

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160525-ipv6(Vendor Advisory)
http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160824-01-ipv6-en(Third Party Advisory)
http://www.securityfocus.com/bid/90872(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1035962(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1035963(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1035964(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1035965(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1036651

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

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