Multiple unspecified vulnerabilities in Microsoft Windows Help File viewer (winhlp32.exe) allow user-assisted attackers to execute arbitrary code via crafted HLP files.
Conclusion & alert: CVE-2006-4138 is rated High Exploit Risk (79.9/100): CVSS High severity, with high exploitation likelihood (EPSS 45.48%, 97th percentile). Core evidence: 2 public exploit reference(s) are indexed (Exploit-DB). 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 |
|---|---|---|---|---|
| 28381 | exploit_db | edb | 2006-08-12 | 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 | 2025-04-02 | 45.09% | 45.48% | +0.40% |
| 2 | 2025-03-30 | 51.36% | 45.09% | -6.28% |
| 3 | 2025-03-29 | — | 51.36% | — |
Full EPSS history (14 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.6 | 2.0 | HIGH |
|
4.9 | 10.0 | [email protected] |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| microsoft | help_file_viewer | — | cpe:2.3:a:microsoft:help_file_viewer:*:*:*:*:*:*:*:* |