CVE-2006-3456: Symantec Norton Antivirus

High severity, CVSS 8.5. EPSS: 3.9% chance of exploitation in the next 30 days.

The Symantec NAVOPTS.DLL ActiveX control (aka Symantec.Norton.AntiVirus.NAVOptions) 12.2.0.13, as used in Norton AntiVirus, Internet Security, and System Works 2005 and 2006, is designed for use only in application-embedded web browsers, which allows remote attackers to "crash the control" via unspecified vectors related to content on a web site, and place Internet Explorer into a "defunct state" in which remote attackers can execute arbitrary code in addition to other Symantec ActiveX controls, regardless of whether they are marked safe for scripting. NOTE: this CVE was inadvertently used for an E-mail Auto-Protect issue, but that issue has been assigned CVE-2007-3771.

Affected products

• Symantec Norton Antivirus: version 2005 only; version 2006 only
• Symantec Norton Internet Security: version 2005 only; version 2006 only
• Symantec Norton System Works: version 2005 only; version 2006 only

Published 2007-05-11. Last modified 2026-06-16.