Is CVE-2015-4506 in the CISA KEV catalog?

No. CVE-2015-4506 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2015-4506?

CVE-2015-4506 has a CVSS v2 base score of 6.8 (MEDIUM).

What is the EPSS score for CVE-2015-4506?

CVE-2015-4506 has an EPSS score of 4.92% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2015-4506?

Upgrade libvpx on debian 11 to 1.4.0-4 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2015-4506

MEDIUMEPSS 91th pctl

6.8

CVSS v2

NVD

Description

Buffer overflow in the vp9_init_context_buffers function in libvpx, as used in Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3, allows remote attackers to execute arbitrary code via a crafted VP9 file.

CWE-119Buffer Overflow

How to fix

Remediation Available

libvpxDebian

Fixed in:1.4.0-4CVE-2015-4506

firefoxUbuntu

Fixed in:41.0+build3-0ubuntu0.14.04.1USN-2743-1

thunderbirdUbuntu

Fixed in:1:38.3.0+build1-0ubuntu0.14.04.1USN-2754-1

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

4.92%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Vendor Advisory1

mozilla.org

Other references17

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

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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.