Is CVE-2004-0493 in the CISA KEV catalog?

No. CVE-2004-0493 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2004-0493?

CVE-2004-0493 has a CVSS v2 base score of 6.4 (MEDIUM).

What is the EPSS score for CVE-2004-0493?

CVE-2004-0493 has an EPSS score of 84.78% (100th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2004-0493

MEDIUMEPSS 100th pctl

6.4

CVSS v2

NVD

Description

The ap_get_mime_headers_core function in Apache httpd 2.0.49 allows remote attackers to cause a denial of service (memory exhaustion), and possibly an integer signedness error leading to a heap-based buffer overflow on 64 bit systems, via long header lines with large numbers of space or tab characters.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

84.78%probability of exploitation in 30 days

100thpercentile

Very high risk: more likely to be exploited than 100% 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.