CVE-2000-0457
highpriority · attend · 58EPSS 0.528 · 99 %ileexploit · functionalEUUSEPSS · scored 2026-10-23
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- EDB-19908Microsoft IIS 4.0/5.0 - Malformed Filename Requestfunctional · exploit_db
affected products (3)
Products and version ranges known to be affected.
- microsoft internet information server= 4.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*
- microsoft internet information services= 5.0nvdUScpe:2.3:a:microsoft:internet_information_services:*:*:*:*:*:*:*:*
also known as (2)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (8)
External citations — patches, advisories, analysis.
- http://marc.info/?l=bugtraq&m=95810120719608&w=2enisa_euvd
- http://www.securityfocus.com/bid/1193enisa_euvd
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-031enisa_euvd
- https://exchange.xforce.ibmcloud.com/vulnerabilities/4448enisa_euvd
- http://marc.info/?l=bugtraq&m=95810120719608&w=2nvd
- http://www.securityfocus.com/bid/1193nvd
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-031nvd
- https://exchange.xforce.ibmcloud.com/vulnerabilities/4448nvd
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