Is CVE-2014-3581 in the CISA KEV catalog?

No. CVE-2014-3581 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-3581?

CVE-2014-3581 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2014-3581?

CVE-2014-3581 has an EPSS score of 13.45% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-3581?

Upgrade apache2 on debian 11 to 2.4.10-3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2014-3581

MEDIUMEPSS 96th pctl

5.0

CVSS v2

NVD

Description

The cache_merge_headers_out function in modules/cache/cache_util.c in the mod_cache module in the Apache HTTP Server before 2.4.11 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via an empty HTTP Content-Type header.

CWE-476NULL Pointer Dereference

How to fix

Remediation Available

apache2Debian

Fixed in:2.4.10-3CVE-2014-3581

apache2Ubuntu

Fixed in:2.4.7-1ubuntu4.4USN-2523-1

apache2.2-binUbuntu

Fixed in:2.4.7-1ubuntu4.4USN-2523-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

13.45%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Related Vulnerabilities

Other CWE-476 (NULL Pointer Dereference) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-21758	High	7.5	92%	-	Fix
CVE-2023-21547	High	7.5	88%	-	Fix
CVE-2014-3470	Medium	4.3	86%	-	Fix
CVE-2021-44224	High	8.2	82%	-	Fix
CVE-2016-0742	High	7.5	82%	-	Fix
CVE-2009-1386	Medium	5.0	80%	-	Fix

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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 2026-05-06.