How severe is CVE-2000-1149?

CVE-2000-1149 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2000-1149 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-1149?

CVE-2000-1149 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2000-1149?

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-2000-1149 published?

CVE-2000-1149 was published on 2001-01-09 and last updated on 2026-06-16.

CVE-2000-1149

CVE-2000-1149 is a high-severity vulnerability in Microsoft Windows Nt with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 16% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 16% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 2001-01-09
Last modified: 2026-06-16

Description

Buffer overflow in RegAPI.DLL used by Windows NT 4.0 Terminal Server allows remote attackers to execute arbitrary commands via a long username, aka the "Terminal Server Login Buffer Overflow" vulnerability.

Frequently asked questions

What is CVE-2000-1149?: Buffer overflow in RegAPI.DLL used by Windows NT 4.0 Terminal Server allows remote attackers to execute arbitrary commands via a long username, aka the "Terminal Server Login Buffer Overflow" vulnerability.
How severe is CVE-2000-1149?: CVE-2000-1149 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2000-1149 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-1149?: CVE-2000-1149 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2000-1149?: 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-2000-1149 published?: CVE-2000-1149 was published on 2001-01-09 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_nt:terminal_server:*:*:*:*:*:*:*

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