CVE-1999-1164

NONECVSS 0.0

0.0

Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with the same X-UIDL headers, which causes Outlook to hang.

CVSS v3: —
EG Score: —
EPSS: 91.5%
KEV: Not listed

Published

June 25, 1999

Last Modified

April 16, 2026

References (2)

cve@mitrehttp://marc.info/?l=bugtraq&m=93041631215856&w=2
af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=93041631215856&w=2

Data Freshness Timeline

(refreshed 11× 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-1999-1164?

CVE-1999-1164 is a none vulnerability published on June 25, 1999. Microsoft Outlook client allows remote attackers to cause a denial of service by sending multiple email messages with the same X-UIDL headers, which causes Outlook to hang.

When was CVE-1999-1164 disclosed?

CVE-1999-1164 was first published in the National Vulnerability Database on June 25, 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-1999-1164 actively exploited?

CVE-1999-1164 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 91.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-1164?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-1164, 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-1999-1164

📅 Published

🔄 Last Modified

🔗 References (2)