Is CVE-2014-1581 in the CISA KEV catalog?

No. CVE-2014-1581 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-1581?

CVE-2014-1581 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2014-1581?

CVE-2014-1581 has an EPSS score of 3.98% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-1581?

Upgrade firefox on ubuntu 14.04 to 33.0+build2-0ubuntu0.14.04.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2014-1581

HIGHEPSS 89th pctl

7.5

CVSS v2

NVD

Description

Use-after-free vulnerability in DirectionalityUtils.cpp in Mozilla Firefox before 33.0, Firefox ESR 31.x before 31.2, and Thunderbird 31.x before 31.2 allows remote attackers to execute arbitrary code via text that is improperly handled during the interaction between directionality resolution and layout.

How to fix

Remediation Available

firefoxUbuntu

Fixed in:33.0+build2-0ubuntu0.14.04.1USN-2372-1

thunderbirdUbuntu

Fixed in:1:31.2.0+build2-0ubuntu0.14.04.1USN-2373-1

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

3.98%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% 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 2026-05-06.