The Citrix EPA ActiveX control (aka the "endpoint checking control" or CCAOControl Object) before 4.5.0.0 in npCtxCAO.dll in Citrix Access Gateway Standard Edition before 4.5.5 and Advanced Edition before 4.5 HF1 allows remote attackers to download and execute arbitrary programs onto a client system.
Conclusion & alert: CVE-2007-3679 is rated Moderate Risk (43.5/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.68%). Mandatory action: Review affected assets and schedule 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 | 1.17% | 1.68% | +0.50% |
| 2 | 2026-03-13 | 1.05% | 1.17% | +0.12% |
| 3 | 2025-08-19 | — | 1.05% | — |
Full EPSS history (13 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
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| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| citrix | access_gateway | <= 4.5 | cpe:2.3:a:citrix:access_gateway:*:hf1:advanced:*:*:*:*:* |
| citrix | access_gateway | <= 4.5.5 | cpe:2.3:a:citrix:access_gateway:*:*:standard:*:*:*:*:* |