VULNERABILITY INTELLIGENCE
CVE-2001-0004
CVSS score5 MEDIUM
EPSS probability28.21%
CISA KEVNot currently listed
Published2001-02-12
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:N/A:N
Description
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.