CVE-2000-0457

High CVSS 7.5

Published 2000-05-11 · last changed 2026-06-16

The fix

We hold no Microsoft remediation data for CVE-2000-0457, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

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.

Sources

NVD record for CVE-2000-0457

CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P