CVE-2000-0258

HIGHNVD 7.57.5—Trending — 3 sources updated this weekElevated

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: 7.5(medium)
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

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-20Improper Input Validation

Data Freshness Timeline

(refreshed 12× in last 7d / 20× 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.

2026-06-02 20:10 UTCepss_batch
2026-06-01 13:48 UTCepss_batch
2026-05-31 22:27 UTCepss_batch
2026-05-31 21:46 UTCEG score recompute
2026-05-31 21:46 UTCGHSA enrichment
2026-05-31 00:13 UTCepss_batch
2026-05-31 00:13 UTCepss_batch
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
2026-05-28 13:42 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-27 13:37 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-26 07:16 UTCepss_batch
2026-05-24 16:42 UTCepss_batch
2026-05-22 21:15 UTCepss_batch
2026-05-21 22:38 UTCepss_batch
2026-05-20 22:36 UTCepss_batch

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)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2000-0258?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (4)

Frequently asked(5)

Related CVEs(same CWE)