Is CVE-2006-3873 in the CISA KEV catalog?

No. CVE-2006-3873 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-3873?

CVE-2006-3873 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2006-3873?

CVE-2006-3873 has an EPSS score of 28.57% (98th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2006-3873

HIGHEPSS 98th pctl

7.5

CVSS v2

NVD

Description

Heap-based buffer overflow in URLMON.DLL in Microsoft Internet Explorer 6 SP1 on Windows 2000 and XP SP1, with versions the MS06-042 patch before 20060912, allows remote attackers to cause a denial of service (crash) or execute arbitrary code via a long URL in a GZIP-encoded website that was the target of an HTTP redirect, due to an incomplete fix for CVE-2006-3869.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

28.57%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% 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 2026-04-16.