Is CVE-2006-4812 in the CISA KEV catalog?

No. CVE-2006-4812 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2006-4812?

CVE-2006-4812 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2006-4812?

CVE-2006-4812 has an EPSS score of 15.01% (96th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2006-4812

HIGHEPSS 96th pctl

10.0

CVSS v2

NVD

Description

Integer overflow in PHP 5 up to 5.1.6 and 4 before 4.3.0 allows remote attackers to execute arbitrary code via an argument to the unserialize PHP function with a large value for the number of array elements, which triggers the overflow in the Zend Engine ecalloc function (Zend/zend_alloc.c).

CWE-94Code Injection

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

15.01%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% 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.