CVE-2000-0457 in the critical feed json
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 spa…
published 2000-05-11 26 y ago modified 2026-06-16 4 mo ago also EUVD-2000-0456
- cvss
- 7.5
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 52.8%
- EPSS 52.8% chance of exploitation in 30 days, percentile 98%
- public exploits
- 1
- Exploit-DB
Summary
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.
Timeline
- First public exploit (EDB-19908)
- Published
Exploit prediction
52.75% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-19908 Microsoft IIS 4.0/5.0 - Malformed Filename Request remote, 2000-05-11
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.5 | AV:N/AC:L/Au:N/C:P/I:P/A:P |
References
-
docs.microsoft.com
/en-us/security-updates/securitybulletins/2000/ms00-031
vendor-advisory
-
marc.info
/?l=bugtraq&m=95810120719608&w=2
mailing-list
-
exchange.xforce.ibmcloud.com
/vulnerabilities/4448
vdb-entry
-
securityfocus.com
/bid/1193
vdb-entry
Sources
- CVE List CVE-2000-0457
- NVD CVE-2000-0457
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.