Is CVE-2014-1560 in the CISA KEV catalog?

No. CVE-2014-1560 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-1560?

CVE-2014-1560 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2014-1560?

CVE-2014-1560 has an EPSS score of 1.11% (62th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-1560?

Upgrade firefox on ubuntu 14.04 to 31.0+build1-0ubuntu0.14.04.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2014-1560

MEDIUM

4.3

CVSS v2

NVD

Description

Mozilla Firefox before 31.0 and Thunderbird before 31.0 allow remote attackers to cause a denial of service (X.509 certificate parsing outage) via a crafted certificate that does not use ASCII character encoding in a required context.

How to fix

Remediation Available

firefoxUbuntu

Fixed in:31.0+build1-0ubuntu0.14.04.1USN-2295-1

thunderbirdUbuntu

Fixed in:1:31.0+build1-0ubuntu0.14.04.1USN-2296-1

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

1.11%probability of exploitation in 30 days

62ndpercentile

Moderate risk: more likely to be exploited than 62% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references5

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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.