Format string vulnerability in the SMTP server for McAfee WebShield 4.5 MR2 and earlier allows remote attackers to execute arbitrary code via format strings in the domain name portion of a destination address, which are not properly handled when a bounce message is constructed.
Conclusion & alert: CVE-2006-0559 is rated High Risk (67.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 6.08%, 92th 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 | 19.53% | 6.08% | -13.45% |
| 2 | 2025-06-23 | 19.57% | 19.53% | -0.04% |
| 3 | 2025-03-30 | — | 19.57% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 10.0 | 2.0 | HIGH |
|
10.0 | 10.0 | [email protected] |
: The vendor has released a patch (P0803), along with version 4.5 MR2 to address this issue.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| mcafee | webshield_smtp | <= 4.5 | cpe:2.3:a:mcafee:webshield_smtp:*:mr2_patch:*:*:*:*:*:* |