Is CVE-2014-8634 in the CISA KEV catalog?

No. CVE-2014-8634 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-8634?

CVE-2014-8634 has a CVSS v2 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2014-8634?

CVE-2014-8634 has an EPSS score of 3.86% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-8634?

Upgrade firefox on ubuntu 14.04 to 35.0+build3-0ubuntu0.14.04.2 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2014-8634

HIGHEPSS 89th pctl

7.5

CVSS v2

NVD

Description

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

How to fix

Remediation Available

firefoxUbuntu

Fixed in:35.0+build3-0ubuntu0.14.04.2USN-2458-1

thunderbirdUbuntu

Fixed in:1:31.4.0+build1-0ubuntu0.14.04.1USN-2460-1

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

3.86%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.