CVE-1999-0366

NONECVSS 0.0

0.0

In some cases, Service Pack 4 for Windows NT 4.0 can allow access to network shares using a blank password, through a problem with a null NT hash value.

CVSS v3: —
EG Score: —
EPSS: 90.5%
KEV: Not listed

Published

February 8, 1999

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ214840
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-004
af854a3a-2127-422b-91ae-364da2661108http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ214840
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-004

Data Freshness Timeline

(refreshed 11× in last 7d / 17× 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
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
2026-05-28 13:42 UTCepss_batch
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2026-05-18 21:29 UTCepss_batch
2026-05-18 21:29 UTCepss_batch

Frequently asked(4)

What is CVE-1999-0366?

CVE-1999-0366 is a none vulnerability published on February 8, 1999. In some cases, Service Pack 4 for Windows NT 4.0 can allow access to network shares using a blank password, through a problem with a null NT hash value.

When was CVE-1999-0366 disclosed?

CVE-1999-0366 was first published in the National Vulnerability Database on February 8, 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-1999-0366 actively exploited?

CVE-1999-0366 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 90.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0366?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0366, 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-1999-0366

📅 Published

🔄 Last Modified

🔗 References (4)