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Vulnerability record · CVE-2006-3423 · published 7 July 2006

CVE-2006-3423: Webex communications downloader activexcontrol improper input validation vulnerability

WWebex Communications · Downloader Activexcontrol

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.

9.3 CVSS 2.0 High EPSS 8.7% · top 5.0% CWE-20 · Improper input validation
9.3CVSS 2.0 base score
8.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
22References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://secunia.com/advisories/20956 PatchVendor Advisory
http://securitytracker.com/id?1016446
http://www.osvdb.org/27039
http://www.osvdb.org/27040
http://www.securityfocus.com/archive/1/439496/100/0/threaded
http://www.securityfocus.com/bid/18860
http://www.vupen.com/english/advisories/2006/2688 Vendor Advisory
http://www.webex.com/lp/security/ActiveAdv.html?TrackID=123456
http://www.zerodayinitiative.com/advisories/ZDI-06-021.html Vendor Advisory
http://xforce.iss.net/xforce/alerts/id/226
https://exchange.xforce.ibmcloud.com/vulnerabilities/24370
http://secunia.com/advisories/20956 PatchVendor Advisory
http://securitytracker.com/id?1016446
http://www.osvdb.org/27039
http://www.osvdb.org/27040
http://www.securityfocus.com/archive/1/439496/100/0/threaded
http://www.securityfocus.com/bid/18860
http://www.vupen.com/english/advisories/2006/2688 Vendor Advisory
http://www.webex.com/lp/security/ActiveAdv.html?TrackID=123456
http://www.zerodayinitiative.com/advisories/ZDI-06-021.html Vendor Advisory
http://xforce.iss.net/xforce/alerts/id/226
https://exchange.xforce.ibmcloud.com/vulnerabilities/24370

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2006-3423), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.