CVE-2001-0004
IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server...
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.
Exploit likelihood
What each source reports
NVD Score used
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.
- Record
CVE-2001-0004- CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Updated
- 2026-11-02
CVE List No score
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.
- Record
CVE-2001-0004- Updated
- 2026-11-02
EUVDEUVD-2001-0004 No score
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.
- Record
EUVD-2001-0004- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-mr3v-pmm4-26v3 No score
IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server...
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.
- Record
GHSA-mr3v-pmm4-26v3- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2001-0004 is a medium vulnerability (CVSS 5.0) in Microsoft Internet Information Server, published February 12, 2001. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 28.2%, the 98th percentile. No source names a fixed version.