CVE-2000-0258

HIGHNVD 7.5Elevated

7.5

IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the "Myriad Escaped Characters" Vulnerability.

CVSS v3: 7.5
EG Score: —
EPSS: 95.6%
KEV: Not listed

Published

April 12, 2000

Last Modified

April 16, 2026

References (4)

cve@mitrehttp://www.securityfocus.com/bid/1101
cve@mitrehttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/1101
af854a3a-2127-422b-91ae-364da2661108https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-023

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
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Frequently asked(5)

What is CVE-2000-0258?

CVE-2000-0258 is a high vulnerability published on April 12, 2000. IIS 4.0 and 5.0 allows remote attackers to cause a denial of service by sending many URLs with a large number of escaped characters, aka the "Myriad Escaped Characters" Vulnerability.

When was CVE-2000-0258 disclosed?

CVE-2000-0258 was first published in the National Vulnerability Database on April 12, 2000, 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-2000-0258 actively exploited?

CVE-2000-0258 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 95.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2000-0258?

CVE-2000-0258 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2000-0258?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2000-0258, 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-2000-0258

📅 Published

🔄 Last Modified

🔗 References (4)