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Fencer Vulns
medium 5.0

CVE-2002-0419 json

Information leaks in IIS 4 through 5.1 allow remote attackers to obtain potentially sensitive information or more easily conduct brute forc…

published 2002-06-11 24 y ago modified 2026-06-16 4 mo ago also EUVD-2002-0416

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
37.3%
EPSS 37.3% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

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.

Timeline

  1. First public exploit (EDB-21313)
  2. Published

Exploit prediction

37.30% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21313 Microsoft IIS 4.0/5.0/5.1 - Authentication Method Disclosure remote, 2002-03-05
  • securityfocus.com http://www.securityfocus.com/bid/4235 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.