CVE-2001-0500

Name: CVE-2001-0500
Creator: NVD / NIST
Published: 2001-07-21T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 96.73%

Last modified Jun 16, 2026

CVE-2001-0500 is a vulnerability of currently unknown severity. Buffer overflow in ISAPI extension (idq.dll) in Index Server 2.0 and Indexing Service 2000 in IIS 6.0 beta and earlier allows remote attackers to execute arbitrary commands via a long argument to Internet Data Administration (.ida) and Internet Data Query (.idq) files such as default.ida, as commonly exploited by Code Red.. EPSS estimates a 96.73% chance of exploitation in the next 30 days.

Description

Buffer overflow in ISAPI extension (idq.dll) in Index Server 2.0 and Indexing Service 2000 in IIS 6.0 beta and earlier allows remote attackers to execute arbitrary commands via a long argument to Internet Data Administration (.ida) and Internet Data Query (.idq) files such as default.ida, as commonly exploited by Code Red.

Metrics

EPSS Probability

96.73%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Microsoft	Index Server	2.0	—
Microsoft	Indexing Service	All versions	—
Microsoft	Internet Information Server	<= 6.0	Beta

References

Timeline

Published: Jul 21, 2001
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2001-0500?

How severe is CVE-2001-0500?

Severity scoring for CVE-2001-0500 is pending analysis. The EPSS model estimates a 96.73% probability of exploitation in the next 30 days.

How do I fix CVE-2001-0500?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2001-0500?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST