How severe is CVE-1999-0723?

CVE-1999-0723 has a CVSS 2.0 base score of 7.1, rated high severity.

Is CVE-1999-0723 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-1999-0723?

CVE-1999-0723 primarily affects Microsoft Windows 2000. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0723?

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-1999-0723 published?

CVE-1999-0723 was published on 1999-06-23 and last updated on 2026-06-16.

CVE-1999-0723

CVE-1999-0723 is a high-severity vulnerability in Microsoft Windows 2000 with a CVSS 2.0 base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.1)
EPSS exploit prediction: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Microsoft Windows 2000
Published: 1999-06-23
Last modified: 2026-06-16

Description

The Windows NT Client Server Runtime Subsystem (CSRSS) can be subjected to a denial of service when all worker threads are waiting for user input.

Frequently asked questions

What is CVE-1999-0723?: The Windows NT Client Server Runtime Subsystem (CSRSS) can be subjected to a denial of service when all worker threads are waiting for user input.
How severe is CVE-1999-0723?: CVE-1999-0723 has a CVSS 2.0 base score of 7.1, rated high severity.
Is CVE-1999-0723 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-1999-0723?: CVE-1999-0723 primarily affects Microsoft Windows 2000. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0723?: 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-1999-0723 published?: CVE-1999-0723 was published on 1999-06-23 and last updated on 2026-06-16.

References

Affected products (3)

cpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_nt:4.0:sp5:*:*:*:*:*:*

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