How severe is CVE-2000-0331?

CVE-2000-0331 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2000-0331 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2000-0331?

CVE-2000-0331 primarily affects Microsoft Terminal Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2000-0331?

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

When was CVE-2000-0331 published?

CVE-2000-0331 was published on 2000-04-20 and last updated on 2026-06-16.

CVE-2000-0331

CVE-2000-0331 is a medium-severity vulnerability in Microsoft Terminal Server with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Terminal Server
Published: 2000-04-20
Last modified: 2026-06-16

Description

Buffer overflow in Microsoft command processor (CMD.EXE) for Windows NT and Windows 2000 allows a local user to cause a denial of service via a long environment variable, aka the "Malformed Environment Variable" vulnerability.

Frequently asked questions

What is CVE-2000-0331?: Buffer overflow in Microsoft command processor (CMD.EXE) for Windows NT and Windows 2000 allows a local user to cause a denial of service via a long environment variable, aka the "Malformed Environment Variable" vulnerability.
How severe is CVE-2000-0331?: CVE-2000-0331 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2000-0331 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2000-0331?: CVE-2000-0331 primarily affects Microsoft Terminal Server. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2000-0331?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2000-0331 published?: CVE-2000-0331 was published on 2000-04-20 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:a:microsoft:terminal_server:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*

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