Is CVE-2014-1491 in the CISA KEV catalog?

No. CVE-2014-1491 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-1491?

CVE-2014-1491 has a CVSS v2 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2014-1491?

CVE-2014-1491 has an EPSS score of 4.66% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-1491?

Upgrade nss on debian 11 to 2:3.15.4-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2014-1491

MEDIUMEPSS 91th pctl

4.3

CVSS v2

NVD

Description

Mozilla Network Security Services (NSS) before 3.15.4, as used in Mozilla Firefox before 27.0, Firefox ESR 24.x before 24.3, Thunderbird before 24.3, SeaMonkey before 2.24, and other products, does not properly restrict public values in Diffie-Hellman key exchanges, which makes it easier for remote attackers to bypass cryptographic protection mechanisms in ticket handling by leveraging use of a certain value.

CWE-326

How to fix

Remediation Available

nssDebian

Fixed in:2:3.15.4-1CVE-2014-1491

DeveloperEditionWindows application

Affected:24.3Fixed in:24.3Mozilla

Affected:27.0Fixed in:27.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:24.3Fixed in:24.3Mozilla

Affected:27.0Fixed in:27.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:24.3.0Fixed in:24.3.0Mozilla

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

4.66%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% 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 2026-04-29.