CVE-2001-0500

highpriority · act · 84EPSS 0.967 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

6 exploits · functional

Likely / severe?

96.7% (100th) EPSS

CVSS 10 · high

Is it mine?

4 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

10.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 10 · impact 10

v2.010highAV:N/AC:L/Au:N/C:C/I:C/A:C/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USLLM-inferred

exploits (6)

Public proof-of-concept and weaponised exploit code.

EDB-16472Microsoft IIS 5.0 - IDQ Path Overflow (MS01-033) (Metasploit)functional · exploit_db
EDB-20930Microsoft Index Server 2.0 / Indexing Service (Windows 2000) - ISAPI Extension Buffer Overflow (PoC)functional · exploit_db
EDB-20931Microsoft Index Server 2.0 / Indexing Service (Windows 2000) - ISAPI Extension Buffer Overflow (2)functional · exploit_db
EDB-20932Microsoft Index Server 2.0 / Indexing Service (Windows 2000) - ISAPI Extension Buffer Overflow (3)functional · exploit_db
EDB-20933Microsoft Index Server 2.0 / Indexing Service (Windows 2000) - ISAPI Extension Buffer Overflow (4)functional · exploit_db
exploit/windows/iis/ms01_033_idqMS01-033 Microsoft IIS 5.0 IDQ Path Overflowfunctional · metasploit

affected products (4)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft index server= 2.0nvdUScpe:2.3:a:microsoft:index_server:*:*:*:*:*:*:*:*
microsoft indexing serviceall versionsnvdUScpe:2.3:a:microsoft:indexing_service:*:*:*:*:*:*:*:*
microsoft internet information server≤ 6.0nvdUScpe:2.3:a:microsoft:internet_information_server:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2001-07-21modified 2026-06-16

references (14)

External citations — patches, advisories, analysis.

scry

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