What’s Vulnerable › Vulnerabilities

CVE-2000-0457

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 52.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2000-05-11 · updated 2026-06-16

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.

Affected products

• Microsoft Internet Information Server: 4.0
• Microsoft IIS: 5.0

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
• 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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