Is CVE-2015-4474 in the CISA KEV catalog?

No. CVE-2015-4474 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-4474?

CVE-2015-4474 has a CVSS v2 base score of 10.0 (HIGH).

What is the EPSS score for CVE-2015-4474?

CVE-2015-4474 has an EPSS score of 6.44% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4474?

Upgrade firefox on ubuntu 14.04 to 40.0+build4-0ubuntu0.14.04.1 or later.

CVE & CISA-KEV Catalog

CVE-2015-4474

HIGHEPSS 93th pctl

10.0

CVSS v2

NVD

Description

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 40.0 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:40.0+build4-0ubuntu0.14.04.1USN-2702-1

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

6.44%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references18

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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.