What’s Vulnerable › Vulnerabilities

CVE-1999-0995

• Severity: high (CVSS 7.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 21.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2000-01-18 · updated 2026-06-16
• Weakness: CWE-20

Description

Windows NT Local Security Authority (LSA) allows remote attackers to cause a denial of service via malformed arguments to the LsaLookupSids function which looks up the SID, aka "Malformed Security Identifier Request."

Affected products

• Microsoft Windows Nt: 4.0, 4.0-sp1

References

• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ248185
• http://www.securityfocus.com/bid/875
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-057
• http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ248185
• http://www.securityfocus.com/bid/875
• https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-057

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