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).
Conclusion & alert: CVE-2005-4360 is rated High Exploit Risk (82.2/100): CVSS High severity, with high exploitation likelihood (EPSS 78.42%, 99th percentile). Core evidence: 4 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +1.36% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| 1377 | exploit_db | edb | 2005-12-19 | Exploit-DB ↗ |
| 1376 | exploit_db | edb | 2005-12-19 | Exploit-DB ↗ |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ | |
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-04-17 | 77.06% | 78.42% | +1.36% |
| 2 | 2025-12-28 | 73.13% | 77.06% | +3.94% |
| 3 | 2025-12-27 | — | 73.13% | — |
Full EPSS history (21 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | internet_information_services | 5.1 | cpe:2.3:a:microsoft:internet_information_services:5.1:*:*:*:*:*:*:* |