CVE-1999-0391

NONECVSS 0.0

0.0

The cryptographic challenge of SMB authentication in Windows 95 and Windows 98 can be reused, allowing an attacker to replay the response and impersonate a user.

CVSS v3: —
EG Score: —
EPSS: 89.3%
KEV: Not listed

Published

January 5, 1999

Last Modified

April 16, 2026

References (2)

cve@mitrehttps://marc.info/?l=bugtraq&m=91552769809542&w=2
af854a3a-2127-422b-91ae-364da2661108https://marc.info/?l=bugtraq&m=91552769809542&w=2

Data Freshness Timeline

(refreshed 13× in last 7d / 19× 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-1999-0391?

CVE-1999-0391 is a none vulnerability published on January 5, 1999. The cryptographic challenge of SMB authentication in Windows 95 and Windows 98 can be reused, allowing an attacker to replay the response and impersonate a user.

When was CVE-1999-0391 disclosed?

CVE-1999-0391 was first published in the National Vulnerability Database on January 5, 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-1999-0391 actively exploited?

CVE-1999-0391 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 89.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0391?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0391, 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-1999-0391

📅 Published

🔄 Last Modified

🔗 References (2)