CVE-2001-0500

Exp

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.

Published: 2001-07-21 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2001-0500 is rated High Exploit Risk (89.3/100): CVSS Critical severity, with high exploitation likelihood (EPSS 90.19%, 100th percentile). 6 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2001-0500

EDB-ID Source Kind Published Link
16472 exploit_db edb 2010-06-15 Exploit-DB ↗
20931 exploit_db edb 2001-06-21 Exploit-DB ↗
20933 exploit_db edb 2001-06-18 Exploit-DB ↗
20932 exploit_db edb 2001-06-18 Exploit-DB ↗
20930 exploit_db edb 2001-06-18 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2001-0500

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-01 90.75% 90.19% -0.56%
2 2026-03-28 90.98% 90.75% -0.23%
3 2026-03-09 — 90.98% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2001-0500

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2001-0500

Affected software / configurations for CVE-2001-0500

Vendor Product Version Raw CPE
microsoft index_server 2.0 cpe:2.3:a:microsoft:index_server:2.0:*:*:*:*:*:*:*
microsoft indexing_service — cpe:2.3:a:microsoft:indexing_service:*:*:windows_2000:*:*:*:*:*
microsoft internet_information_server <= 6.0 cpe:2.3:a:microsoft:internet_information_server:*:beta:*:*:*:*:*:*

References for CVE-2001-0500

cvelogic Threat Intelligence