How severe is CVE-2006-3451?

CVE-2006-3451 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2006-3451 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 41% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3451?

CVE-2006-3451 primarily affects Microsoft Ie. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3451?

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-2006-3451 published?

CVE-2006-3451 was published on 2006-08-08 and last updated on 2026-06-16.

CVE-2006-3451

CVE-2006-3451 is a high-severity vulnerability in Microsoft Ie with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 41% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 41% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Microsoft Ie
Published: 2006-08-08
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 5 SP4 and 6 do not properly garbage collect when "multiple imports are used on a styleSheets collection" to construct a chain of Cascading Style Sheets (CSS), which allows remote attackers to execute arbitrary code via unspecified vectors.

Frequently asked questions

What is CVE-2006-3451?: Microsoft Internet Explorer 5 SP4 and 6 do not properly garbage collect when "multiple imports are used on a styleSheets collection" to construct a chain of Cascading Style Sheets (CSS), which allows remote attackers to execute arbitrary code via unspecified vectors.
How severe is CVE-2006-3451?: CVE-2006-3451 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2006-3451 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 41% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3451?: CVE-2006-3451 primarily affects Microsoft Ie. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3451?: 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-2006-3451 published?: CVE-2006-3451 was published on 2006-08-08 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:microsoft:ie:5.0:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:ie:6:windows_server_2003_sp1:*:*:*:*:*:*

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