CVE-2001-0004 json
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…
published 2001-02-12 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0004
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 28.2%
- EPSS 28.2% chance of exploitation in 30 days, percentile 98%
- public exploits
- 0
- none known
Summary
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 prediction
28.21% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:P/I:N/A:N |
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2001/ms01-004
vendor-advisory
-
securityfocus.com
/bid/2313
vdb-entry
-
exchange.xforce.ibmcloud.com
/vulnerabilities/5903
vdb-entry
-
marc.info
/?l=bugtraq&m=97897954625305&w=2
mailing-list
Sources
- CVE List CVE-2001-0004
- NVD CVE-2001-0004
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.