CVE-1999-0867

NONECVSS 0.0Weaponized

0.0

Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.

CVSS v3: —
EG Score: —
EPSS: 95.5%
KEV: Not listed

Published

August 11, 1999

Last Modified

April 16, 2026

References (8)

cve@mitrehttp://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ238349
cve@mitrehttp://www.ciac.org/ciac/bulletins/j-058.shtml
cve@mitrehttp://www.securityfocus.com/bid/579
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-029
af854a3a-2127-422b-91ae-364da2661108http://support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ238349
af854a3a-2127-422b-91ae-364da2661108http://www.ciac.org/ciac/bulletins/j-058.shtml
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/579
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/1999/ms99-029

Data Freshness Timeline

(refreshed 14× 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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Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-19457✓ verified
First seen Aug 11, 1999
Microsoft Commercial Internet System 2.0/2.5 / IIS 4.0 / Site Server Commerce Edition 3.0 alpha/3.0 - Denial of Service
Open source ↗

Frequently asked(4)

What is CVE-1999-0867?

CVE-1999-0867 is a none vulnerability published on August 11, 1999. Denial of service in IIS 4.0 via a flood of HTTP requests with malformed headers.

When was CVE-1999-0867 disclosed?

CVE-1999-0867 was first published in the National Vulnerability Database on August 11, 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-1999-0867 actively exploited?

CVE-1999-0867 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

How do I remediate CVE-1999-0867?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-1999-0867, 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-1999-0867

📅 Published

🔄 Last Modified

🔗 References (8)