CVE-1999-0995

NONECVSS 0.0Elevated

0.0

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."

CVSS v3: —
EG Score: —
EPSS: 96.5%
KEV: Not listed

Published

December 16, 1999

Last Modified

April 16, 2026

References (6)

cve@mitrehttp://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ248185
cve@mitrehttp://www.securityfocus.com/bid/875
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-057
af854a3a-2127-422b-91ae-364da2661108http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ248185
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/875
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-057

Data Freshness Timeline

(refreshed 12× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-05-29 13:40 UTCepss_batch
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Frequently asked(4)

What is CVE-1999-0995?

CVE-1999-0995 is a none vulnerability published on December 16, 1999. 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."

When was CVE-1999-0995 disclosed?

CVE-1999-0995 was first published in the National Vulnerability Database on December 16, 1999, with the most recent update on April 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-1999-0995 actively exploited?

CVE-1999-0995 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 96.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0995?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0995, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-1999-0995

📅 Published

🔄 Last Modified

🔗 References (6)