Multiple unspecified vulnerabilities in (1) Net6Helper.DLL (aka Net6Launcher Class) 4.5.2 and earlier, (2) npCtxCAO.dll (aka Citrix Endpoint Analysis Client) in a Firefox plugin directory, and (3) a second npCtxCAO.dll (aka CCAOControl Object) before 4.5.0.0 in Citrix Access Gateway Standard Edition before 4.5.5 and Advanced Edition before 4.5 HF1 have unknown impact and attack vectors, possibly related to buffer overflows. NOTE: vector 3 might overlap CVE-2007-3679.
Conclusion & alert: CVE-2007-4013 is rated Moderate Risk (63.6/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.17%). 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 | 2025-03-30 | 1.59% | 1.17% | -0.42% |
| 2 | 2025-03-29 | 1.17% | 1.59% | +0.42% |
| 3 | 2025-03-17 | — | 1.17% | — |
Full EPSS history (10 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] |
: Access Gateway is software offered also as an appliance.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| citrix | access_gateway | <= 4.5 | cpe:2.3:a:citrix:access_gateway:*:*:standard:*:*:*:*:* |
| citrix | access_gateway | <= 4.5 | cpe:2.3:a:citrix:access_gateway:*:hf1:advanced:*:*:*:*:* |
| citrix | endpoint_analysis_client | — | cpe:2.3:a:citrix:endpoint_analysis_client:*:*:*:*:*:*:*:* |
| mozilla | firefox | — | cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* |