How severe is CVE-2006-3456?

CVE-2006-3456 has a CVSS 2.0 base score of 8.5, rated high severity.

Is CVE-2006-3456 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3456?

CVE-2006-3456 primarily affects Symantec Norton Antivirus. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3456?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2006-3456 published?

CVE-2006-3456 was published on 2007-05-11 and last updated on 2026-06-16.

CVE-2006-3456

CVE-2006-3456 is a high-severity vulnerability in Symantec Norton Antivirus with a CVSS 2.0 base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: High (CVSS 2.0 base score 8.5)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Symantec Norton Antivirus
Published: 2007-05-11
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2006-3456?: 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.
How severe is CVE-2006-3456?: CVE-2006-3456 has a CVSS 2.0 base score of 8.5, rated high severity.
Is CVE-2006-3456 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3456?: CVE-2006-3456 primarily affects Symantec Norton Antivirus. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3456?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-3456 published?: CVE-2006-3456 was published on 2007-05-11 and last updated on 2026-06-16.

References

Affected products (6)

cpe:2.3:a:symantec:norton_antivirus:2005:*:*:*:*:*:*:*
cpe:2.3:a:symantec:norton_antivirus:2006:*:*:*:*:*:*:*
cpe:2.3:a:symantec:norton_internet_security:2005:*:*:*:*:*:*:*
cpe:2.3:a:symantec:norton_internet_security:2006:*:*:*:*:*:*:*
cpe:2.3:a:symantec:norton_system_works:2005:*:*:*:*:*:*:*
cpe:2.3:a:symantec:norton_system_works:2006:*:*:*:*:*:*:*

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