CVE-2001-0004
5.0
CVSS v2.0 Base Score
74.23%
HIGH RiskEPSS (99th percentile)
NVD-CWE-Other
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.
Published: 2/12/2001
Modified: 4/16/2026
Vulnerability Summary
CVSS v2 Score
5
AV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS Score (Exploitation Probability)
74.23%HIGH Exploitation Risk
99th percentile
This vulnerability has a 74.23% probability of being exploited in the next 30 days, ranking higher than 99% of all scored CVEs.
CWE Classification
NVD-CWE-Other