How severe is CVE-2001-0347?

CVE-2001-0347 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2001-0347 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2001-0347?

CVE-2001-0347 affects Microsoft Windows 2000. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2001-0347?

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-2001-0347 published?

CVE-2001-0347 was published on 2001-07-21 and last updated on 2026-06-16.

CVE-2001-0347

CVE-2001-0347 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 15% places it in the 96th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 15% (96th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 2000
Published: 2001-07-21
Last modified: 2026-06-16

Description

Information disclosure vulnerability in Microsoft Windows 2000 telnet service allows remote attackers to determine the existence of user accounts such as Guest, or log in to the server without specifying the domain name, via a malformed userid.

Frequently asked questions

What is CVE-2001-0347?: Information disclosure vulnerability in Microsoft Windows 2000 telnet service allows remote attackers to determine the existence of user accounts such as Guest, or log in to the server without specifying the domain name, via a malformed userid.
How severe is CVE-2001-0347?: CVE-2001-0347 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2001-0347 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 15% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0347?: CVE-2001-0347 affects Microsoft Windows 2000. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2001-0347?: 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-2001-0347 published?: CVE-2001-0347 was published on 2001-07-21 and last updated on 2026-06-16.

References

Affected products (1)

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

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