How severe is CVE-1999-0546?

CVE-1999-0546 has a CVSS 2.0 base score of 4.6, rated medium severity.

Is CVE-1999-0546 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0546?

CVE-1999-0546 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-1999-0546?

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

When was CVE-1999-0546 published?

CVE-1999-0546 was published on 1998-10-01 and last updated on 2026-06-16.

CVE-1999-0546

CVE-1999-0546 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% (74th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows Nt
Published: 1998-10-01
Last modified: 2026-06-16

Description

The Windows NT guest account is enabled.

Frequently asked questions

What is CVE-1999-0546?: The Windows NT guest account is enabled.
How severe is CVE-1999-0546?: CVE-1999-0546 has a CVSS 2.0 base score of 4.6, rated medium severity.
Is CVE-1999-0546 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0546?: CVE-1999-0546 affects Microsoft Windows Nt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-1999-0546?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0546 published?: CVE-1999-0546 was published on 1998-10-01 and last updated on 2026-06-16.

References

https://www.cve.org/CVERecord?id=CVE-1999-0546

Affected products (1)

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

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