How severe is CVE-2000-0403?

CVE-2000-0403 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2000-0403 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0403?

CVE-2000-0403 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2000-0403?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2000-0403 published?

CVE-2000-0403 was published on 2000-05-25 and last updated on 2026-06-16.

CVE-2000-0403

CVE-2000-0403 is a medium-severity vulnerability in Microsoft Windows Nt with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 2000-05-25
Last modified: 2026-06-16

Description

The CIFS Computer Browser service on Windows NT 4.0 allows a remote attacker to cause a denial of service by sending a large number of host announcement requests to the master browse tables, aka the "HostAnnouncement Flooding" or "HostAnnouncement Frame" vulnerability.

Frequently asked questions

What is CVE-2000-0403?: The CIFS Computer Browser service on Windows NT 4.0 allows a remote attacker to cause a denial of service by sending a large number of host announcement requests to the master browse tables, aka the "HostAnnouncement Flooding" or "HostAnnouncement Frame" vulnerability.
How severe is CVE-2000-0403?: CVE-2000-0403 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2000-0403 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0403?: CVE-2000-0403 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2000-0403?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0403 published?: CVE-2000-0403 was published on 2000-05-25 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

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