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CVE-1999-1538

LowPublished

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...

Published: Sep 12, 2001
Updated: Aug 1, 2024
Assigning CNA: mitre
Evidence observed: Jan 14, 1999

Primary CVSS

2.1/ 10Low

nvd · CVSS 2.0

AV:L/AC:L/Au:N/C:P/I:N/A:N

EPSS probability estimate

25.3%

Moderate · next 30 days

Percentile: 97.9%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

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.

Sources

Microsoft IIS 4 (Windows NT) - Remote Web-Based AdministrationExploit
Mnemonix · windows · Jan 14, 1999

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