What is CVE-2002-0419?

CVE-2002-0419 is a vulnerability in Microsoft Internet Information Server, classified under Information Disclosure. Published 2002-08-12.

Is CVE-2002-0419 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Information disclosure in Microsoft Internet Information Server

CVE-2002-0419

Information leaks in IIS 4 through 5.1 allow remote attackers to obtain potentially sensitive information or more easily conduct brute force attacks via responses from the server in which (2) in certain configurations, the server IP address is provided as the realm for Basic authentication, which could reveal real IP addresses that were obscured by NAT, or (3) when NTLM authentication is used, the NetBIOS name of the server and its Windows NT domain are revealed in response to an Authorization request. NOTE: this entry originally contained a vector (1) in which the server reveals whether it supports Basic or NTLM authentication through 401 Access Denied error messages. CVE has REJECTED this vector; it is not a vulnerability because the information is already available through legitimate use, since authentication cannot proceed without specifying a scheme that is supported by both the client and the server.

Vulnerability class: Information Disclosure

Published 2002-08-12 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 5.0 (Medium). Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.382 (98.5th percentile), scored 2026-09-29.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.382 · newest: 0.382 · change: 0.000

Affected products

Microsoft Internet Information Server — versions 4.0
Microsoft Internet Information Services — versions 5.0

Weakness classification (CWE)

CWE-200 — Information Disclosure

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.securityfocus.com/bid/4235 (Exploit, vdb-entry, Vendor Advisory)
www.iss.net/security_center/static/8382.php (vdb-entry, Vendor Advisory)
marc.info/ (mailing-list)

Frequently asked questions

What is CVE-2002-0419?: CVE-2002-0419 is a vulnerability in Microsoft Internet Information Server, classified under Information Disclosure. Published 2002-08-12.
Is CVE-2002-0419 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.