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Fencer Vulns
high 7.8

CVE-2005-4360 in the critical feed json

The URL parser in Microsoft Internet Information Services (IIS) 5.1 on Windows XP Professional SP2 allows remote attackers to execute arbit…

published 2005-12-20 20 y ago modified 2026-06-16 4 mo ago also EUVD-2005-4355

cvss
7.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
86.7%
EPSS 86.7% chance of exploitation in 30 days, percentile 99.7%
public exploits
2
Exploit-DB

Summary

The URL parser in Microsoft Internet Information Services (IIS) 5.1 on Windows XP Professional SP2 allows remote attackers to execute arbitrary code via multiple requests to ".dll" followed by arguments such as "~0" through "~9", which causes ntdll.dll to produce a return value that is not correctly handled by IIS, as demonstrated using "/_vti_bin/.dll/*/~0". NOTE: the consequence was originally believed to be only a denial of service (application crash and reboot).

Patch / fix

Timeline

  1. First public exploit (EDB-1377)
  2. Published

Exploit prediction

86.73% chance of exploitation in the next 30 days, higher than 99.7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-1377 Microsoft IIS - HTTP Request Denial of Service (2) dos, 2005-12-19
  • EDB-1376 Microsoft IIS - HTTP Request Denial of Service (1) dos, 2005-12-19
  • ingehenriksen.blogspot.com http://ingehenriksen.blogspot.com/2005/12/microsoft-iis-remote-dos-dll-url.html referenced PoC, tagged "exploit" by a source, unverified
  • secunia.com http://secunia.com/advisories/18106 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:C/A:N

Classification

Weakness

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.