Is CVE-2003-0253 in the CISA KEV catalog?

No. CVE-2003-0253 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2003-0253?

CVE-2003-0253 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2003-0253?

CVE-2003-0253 has an EPSS score of 9.11% (95th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2003-0253?

Upgrade apache2 on debian 11 to 2.0.47 or later.

CVE & CISA-KEV Catalog

CVE-2003-0253

MEDIUMEPSS 95th pctl

5.0

CVSS v2

NVD

Description

The prefork MPM in Apache 2 before 2.0.47 does not properly handle certain errors from accept, which could lead to a denial of service.

How to fix

Remediation Available

apache2Debian

Fixed in:2.0.47CVE-2003-0253

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

9.11%probability of exploitation in 30 days

95thpercentile

High risk: more likely to be exploited than 95% of all known CVEs.

References

Patch1

redhat.com

Other references15

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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.