Is CVE-2008-4258 in the CISA KEV catalog?

No. CVE-2008-4258 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2008-4258?

CVE-2008-4258 has a CVSS v2 base score of 8.5 (HIGH).

What is the EPSS score for CVE-2008-4258?

CVE-2008-4258 has an EPSS score of 17.84% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2008-4258

HIGHEPSS 97th pctl

8.5

CVSS v2

NVD

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."

CWE-399

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

17.84%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.