Is CVE-2001-0004 in the CISA KEV catalog?

No. CVE-2001-0004 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2001-0004?

CVE-2001-0004 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2001-0004?

CVE-2001-0004 has an EPSS score of 28.21% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2001-0004

MEDIUMEPSS 98th pctl

5.0

CVSS v2

NVD

Description

IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the "File Fragment Reading via .HTR" vulnerability.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

28.21%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

http://marc.info/?l=bugtraq&m=97897954625305&w=2
http://www.securityfocus.com/bid/2313
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004
https://exchange.xforce.ibmcloud.com/vulnerabilities/5903

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-16.