What’s Vulnerable › Vulnerabilities

CVE-2016-1409

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-05-29 · updated 2026-06-17
• Weakness: CWE-20

Description

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.

Affected products

• Cisco IOS: 12.0(1), 12.0(1)db, 12.0(1)s, 12.0(1)t, 12.0(1)t1, 12.0(1)xa (+2994)
• Cisco IOS XE: 2.1.0, 2.1.1, 2.1.2, 2.1.3, 2.2.0, 2.2.1 (+190)
• Cisco IOS XR Software: 2.0.0, 3.0.0, 3.0.1, 3.2.0, 3.2.1, 3.2.2 (+74)
• Cisco NX-OS: 1.0(1.110a), 1.0(1e), 1.0(2j), 1.1(0.825a), 1.1(1g), 4.0(0)n1(1a) (+250)

References

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160525-ipv6
• http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160824-01-ipv6-en
• http://www.securityfocus.com/bid/90872
• http://www.securitytracker.com/id/1035962
• http://www.securitytracker.com/id/1035963
• http://www.securitytracker.com/id/1035964
• http://www.securitytracker.com/id/1035965
• http://www.securitytracker.com/id/1036651
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160525-ipv6
• http://www.huawei.com/en/psirt/security-advisories/huawei-sa-20160824-01-ipv6-en
• http://www.securityfocus.com/bid/90872
• http://www.securitytracker.com/id/1035962

Get alerted when CVE-2016-1409 or the next vulnerability affects your stack