How severe is CVE-2000-0834?

CVE-2000-0834 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2000-0834 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0834?

CVE-2000-0834 affects Microsoft Windows 2000. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2000-0834?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2000-0834 published?

CVE-2000-0834 was published on 2000-11-14 and last updated on 2026-06-16.

CVE-2000-0834

CVE-2000-0834 is a high-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 43% places it in the 99th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 43% (99th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 2000
Published: 2000-11-14
Last modified: 2026-06-16

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.

Frequently asked questions

What is CVE-2000-0834?: 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.
How severe is CVE-2000-0834?: CVE-2000-0834 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2000-0834 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 43% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0834?: CVE-2000-0834 affects Microsoft Windows 2000. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2000-0834?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2000-0834 published?: CVE-2000-0834 was published on 2000-11-14 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*

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