Is CVE-2000-0457 in the CISA KEV catalog?

No. CVE-2000-0457 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2000-0457?

CVE-2000-0457 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2000-0457?

CVE-2000-0457 has an EPSS score of 52.75% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2000-0457

HIGHEPSS 99th pctl

7.5

CVSS v2

NVD

Description

ISM.DLL in IIS 4.0 and 5.0 allows remote attackers to read file contents by requesting the file and appending a large number of encoded spaces (%20) and terminated with a .htr extension, aka the ".HTR File Fragment Reading" or "File Fragment Reading via .HTR" vulnerability.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

52.75%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

http://marc.info/?l=bugtraq&m=95810120719608&w=2
http://www.securityfocus.com/bid/1193
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-031
https://exchange.xforce.ibmcloud.com/vulnerabilities/4448

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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.