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Vulnerability record · CVE-2000-0834 · published 14 November 2000

CVE-2000-0834: Microsoft windows 2000 vulnerability

Microsoft · Windows 2000

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.

7.5 CVSS 2.0 High EPSS 40% · top 1.4%
7.5CVSS 2.0 base score
40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
16 Jun 2026Last modified by NVD

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.

AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2000-0834), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.