SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2005-4360

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…

EXPLOIT ×2 ✓HIGH 7.8EPSS 86.7%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 86.7%, higher than 100% of all known CVEs. Patch or mitigate before the next change window.

Description

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).

CVSS 2.0
7.8 HIGHAV:N/AC:L/Au:N/C:N/I:C/A:N
EPSS
86.73% probability · 100th percentile
Public exploits
2 in Exploit-DB · verified · first 19 December 2005
CISA KEV
Not listed
Weakness
CWE-252
Affected
microsoft/internet information services
Source
cve@mitre.org
EPSS trend
0%45%90%26 October 2026: 86.73%26 October 202626 October 2026

EPSS 86.7% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Public exploits (2)

Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.

EDB-IDTitleTypePublishedVerified
EDB-1377source ↗Microsoft IIS - HTTP Request Denial of Service (2)windows · kokanindos19 December 2005yes
EDB-1376source ↗Microsoft IIS - HTTP Request Denial of Service (1)windows · Kozandos19 December 2005yes

References

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.