Is CVE-2014-1523 in the CISA KEV catalog?

No. CVE-2014-1523 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2014-1523?

CVE-2014-1523 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2014-1523?

CVE-2014-1523 has an EPSS score of 3.16% (86th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2014-1523?

Upgrade firefox on ubuntu 14.04 to 29.0+build1-0ubuntu0.14.04.2 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2014-1523

MEDIUMEPSS 86th pctl

6.5

CVSS v3

NVD

Description

Heap-based buffer overflow in the read_u32 function in Mozilla Firefox before 29.0, Firefox ESR 24.x before 24.5, Thunderbird before 24.5, and SeaMonkey before 2.26 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted JPEG image.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

firefoxUbuntu

Fixed in:29.0+build1-0ubuntu0.14.04.2USN-2185-1

thunderbirdUbuntu

Fixed in:1:24.5.0+build1-0ubuntu0.14.04.1USN-2189-1

DeveloperEditionWindows application

Affected:24.0 24.5Fixed in:24.5Mozilla

Affected:29.0Fixed in:29.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:24.0 24.5Fixed in:24.5Mozilla

Affected:29.0Fixed in:29.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:24.5Fixed in:24.5Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploit Intelligence

3.16%probability of exploitation in 30 days

86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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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.