Is CVE-2004-0594 in the CISA KEV catalog?

No. CVE-2004-0594 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0594?

CVE-2004-0594 has a CVSS v2 base score of 5.1 (MEDIUM).

What is the EPSS score for CVE-2004-0594?

CVE-2004-0594 has an EPSS score of 54.86% (99th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0594

MEDIUMEPSS 99th pctl

5.1

CVSS v2

NVD

Description

The memory_limit functionality in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, under certain conditions such as when register_globals is enabled, allows remote attackers to execute arbitrary code by triggering a memory_limit abort during execution of the zend_hash_init function and overwriting a HashTable destructor pointer before the initialization of key data structures is complete.

CWE-367TOCTOU Race Condition

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

54.86%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.