CVE-2000-0071Internet Information Server Vulnerability
IIS 4.0 allows a remote attacker to obtain the real pathname of the document root by requesting non-existent files with .ida or .idq extensions.
Published Jan 11, 2000 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2000-0071 is a medium-severity vulnerability (CVSS 5.0 v2) affecting Internet Information Server (Microsoft), Internet Information Services (Microsoft).
- It is exploited in the wild, listed in Industry KEV feed since Jan 11, 2000. No public exploit code is known.
- EPSS estimates a 28% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Scores
CVSS v2
5.0
AV:N/AC:L/Au:N/C:P/I:N/A:N
EPSS (30-day exploit likelihood)
28%
Higher than 98.1% of all scored CVEs
Exploit maturity
Exploited (KEV)
ATLAS score
40/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Jan 11, 2000
0 days after publication
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Exploited (KEV)
Public exploit code
0
Proof-of-concept links
In-the-wild evidence
1
Reports of active use
Description
IIS 4.0 allows a remote attacker to obtain the real pathname of the document root by requesting non-existent files with .ida or .idq extensions.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| Industry KEV feed | Jan 11, 2000 | n/a | Not reported |
Affected Products
3 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Internet Information ServerMicrosoft | 3.0, 4.0 | n/a |
| Internet Information ServicesMicrosoft | 5.0 | n/a |
Timeline
Publicly disclosed
Jan 11, 2000
Added to Industry KEV feed
Jan 11, 2000
Last updated
Apr 15, 2026
FAQ
Common Questions.
IIS 4.0 allows a remote attacker to obtain the real pathname of the document root by requesting non-existent files with .ida or .idq extensions.
Affected: Internet Information Server (Microsoft) versions 3.0, 4.0; Internet Information Services (Microsoft) versions 5.0. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since Jan 11, 2000.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
No public exploit code is known.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2000-0071 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
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