How severe is CVE-1999-0376?

CVE-1999-0376 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-1999-0376 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0376?

CVE-1999-0376 primarily affects Microsoft Windows Nt. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0376?

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

When was CVE-1999-0376 published?

CVE-1999-0376 was published on 1999-02-20 and last updated on 2026-06-16.

CVE-1999-0376

CVE-1999-0376 is a medium-severity vulnerability in Microsoft Windows Nt with a CVSS 2.0 base score of 4.6. 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 4.6)
EPSS exploit prediction: 2% (82nd percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 1999-02-20
Last modified: 2026-06-16

Description

Local users in Windows NT can obtain administrator privileges by changing the KnownDLLs list to reference malicious programs.

Frequently asked questions

What is CVE-1999-0376?: Local users in Windows NT can obtain administrator privileges by changing the KnownDLLs list to reference malicious programs.
How severe is CVE-1999-0376?: CVE-1999-0376 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-0376 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (82nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0376?: CVE-1999-0376 primarily affects Microsoft Windows Nt. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0376?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0376 published?: CVE-1999-0376 was published on 1999-02-20 and last updated on 2026-06-16.

References

https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-006

Affected products (6)

cpe:2.3:o:microsoft:windows_nt:3.5.1:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp3:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp4:*:*:*:*:*:*

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