WebEx Downloader ActiveX Control and WebEx Downloader Java before 2.1.0.0 do not validate downloaded components, which allows remote attackers to execute arbitrary code via a website that activates the GpcUrlRoot and GpcIniFileName ActiveX controls to cause the client to download a DLL file.
Conclusion & alert: CVE-2006-3423 is rated High Risk (65.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 8.56%, 94th 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 | 13.08% | 8.56% | -4.52% |
| 2 | 2025-03-30 | 11.06% | 13.08% | +2.02% |
| 3 | 2025-03-29 | — | 11.06% | — |
Full EPSS history (11 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 9.3 | 2.0 | HIGH |
|
8.6 | 10.0 | [email protected] |
: Upgrade to version 2.1.0.0.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| webex_communications | downloader_activexcontrol | 2.0.0.7 | cpe:2.3:a:webex_communications:downloader_activexcontrol:2.0.0.7:*:*:*:*:*:*:* |
| webex_communications | downloader_java | 2.0.0.9 | cpe:2.3:a:webex_communications:downloader_java:2.0.0.9:*:*:*:*:*:*:* |