How severe is CVE-2008-4258?

CVE-2008-4258 has a CVSS 2.0 base score of 8.5, rated high severity.

Is CVE-2008-4258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2008-4258?

CVE-2008-4258 primarily affects Microsoft Internet Explorer. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2008-4258?

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-2008-4258 published?

CVE-2008-4258 was published on 2008-12-10 and last updated on 2026-06-16.

CVE-2008-4258

CVE-2008-4258 is a high-severity vulnerability in Microsoft Internet Explorer with a CVSS 2.0 base score of 8.5. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-399.

Key facts

Severity: High (CVSS 2.0 base score 8.5)
EPSS exploit prediction: 18% (97th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
Affected product: Microsoft Internet Explorer
Published: 2008-12-10
Last modified: 2026-06-16

Description

Microsoft Internet Explorer 5.01 SP4 and 6 SP1 does not properly validate parameters during calls to navigation methods, which allows remote attackers to execute arbitrary code via a crafted HTML document that triggers memory corruption, aka "Parameter Validation Memory Corruption Vulnerability."

Frequently asked questions

What is CVE-2008-4258?: Microsoft Internet Explorer 5.01 SP4 and 6 SP1 does not properly validate parameters during calls to navigation methods, which allows remote attackers to execute arbitrary code via a crafted HTML document that triggers memory corruption, aka "Parameter Validation Memory Corruption Vulnerability."
How severe is CVE-2008-4258?: CVE-2008-4258 has a CVSS 2.0 base score of 8.5, rated high severity.
Is CVE-2008-4258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2008-4258?: CVE-2008-4258 primarily affects Microsoft Internet Explorer. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2008-4258?: 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-2008-4258 published?: CVE-2008-4258 was published on 2008-12-10 and last updated on 2026-06-16.

References

Affected products (4)

cpe:2.3:a:microsoft:internet_explorer:5.01:sp4:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:6:sp1:*:*:*:*:*:*
cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:*

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