The ASP function Response.AddHeader in Microsoft Internet Information Server (IIS) 4.0 and 5.0 does not limit memory requests when constructing headers, which allow remote attackers to generate a large header to cause a denial of service (memory consumption) with an ASP page.
Conclusion & alert: CVE-2003-0225 is rated Moderate Risk (49.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 38.46%, 98th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 2026-06-15 | 57.55% | 38.46% | -19.09% |
| 2 | 2026-04-11 | 48.64% | 57.55% | +8.91% |
| 3 | 2025-12-28 | — | 48.64% | — |
Full EPSS history (19 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | internet_information_server | 4.0 | cpe:2.3:a:microsoft:internet_information_server:4.0:*:*:*:*:*:*:* |
| microsoft | internet_information_services | 5.0 | cpe:2.3:a:microsoft:internet_information_services:5.0:*:*:*:*:*:*:* |