What’s Vulnerable › Vulnerabilities

CVE-1999-0721

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2000-01-04 · updated 2026-06-16
• Weakness: CWE-20

Description

Denial of service in Windows NT Local Security Authority (LSA) through a malformed LSA request.

Affected products

• Microsoft Windows 2000: all versions
• Microsoft Windows Nt: 4.0-sp4, 4.0-sp5

References

• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ231457
• http://www.ciac.org/ciac/bulletins/j-049.shtml
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-020
• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ231457
• http://www.ciac.org/ciac/bulletins/j-049.shtml
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-020

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