CVE-1999-1538 json
When IIS 2 or 3 is upgraded to IIS 4, ism.dll is inadvertently left in /scripts/iisadmin, which does not restrict access to the local machi…
published 1999-01-14 27 y ago modified 2026-06-16 4 mo ago also EUVD-1999-1519
- cvss
- 2.1
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 25.3%
- EPSS 25.3% chance of exploitation in 30 days, percentile 97%
- public exploits
- 1
- Exploit-DB
Summary
When IIS 2 or 3 is upgraded to IIS 4, ism.dll is inadvertently left in /scripts/iisadmin, which does not restrict access to the local machine and allows an unauthorized user to gain access to sensitive server information, including the Administrator's password.
Timeline
- First public exploit (EDB-19147)
- Published
Exploit prediction
25.27% chance of exploitation in the next 30 days, higher than 97% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- EDB-19147 Microsoft IIS 4 (Windows NT) - Remote Web-Based Administration remote, 1999-01-14
- securityfocus.com http://www.securityfocus.com/bid/189 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 2.1 | AV:L/AC:L/Au:N/C:P/I:N/A:N |
References
-
securityfocus.com
/bid/189
vdb-entry, exploit
-
marc.info
/?l=bugtraq&m=91638375309890&w=2
mailing-list
-
marc.info
/?l=ntbugtraq&m=91632724913080&w=2
mailing-list
Sources
- CVE List CVE-1999-1538
- NVD CVE-1999-1538
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.