Is CVE-2012-4196 in the CISA KEV catalog?

No. CVE-2012-4196 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2012-4196?

CVE-2012-4196 has a CVSS v2 base score of 6.4 (MEDIUM).

What is the EPSS score for CVE-2012-4196?

CVE-2012-4196 has an EPSS score of 3.29% (87th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2012-4196?

Upgrade DeveloperEdition to 16.0.2 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2012-4196

MEDIUMEPSS 87th pctl

6.4

CVSS v2

NVD

Description

Mozilla Firefox before 16.0.2, Firefox ESR 10.x before 10.0.10, Thunderbird before 16.0.2, Thunderbird ESR 10.x before 10.0.10, and SeaMonkey before 2.13.2 allow remote attackers to bypass the Same Origin Policy and read the Location object via a prototype property-injection attack that defeats certain protection mechanisms for this object.

CWE-74Injection

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:16.0.2Fixed in:16.0.2Mozilla

Affected:10.0 10.0.10Fixed in:10.0.10Mozilla

Mozilla Firefox (en-US)Windows application

Affected:10.0 10.0.10Fixed in:10.0.10Mozilla

Affected:16.0.2Fixed in:16.0.2Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:16.0.2Fixed in:16.0.2Mozilla

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

3.29%probability of exploitation in 30 days

87thpercentile

Elevated risk: more likely to be exploited than 87% of all known CVEs.

References

Patch1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory16

Related Vulnerabilities

Other CWE-74 (Injection) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2013-2251	Critical	9.8	100%	KEV	Fix
CVE-2023-22527	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2019-2725	Critical	9.8	100%	KEV + Ransom	Fix
CVE-2022-46169	Critical	9.8	100%	KEV	Fix
CVE-2022-35914	Critical	9.8	100%	KEV	-
CVE-2019-17558	High	7.5	99%	KEV	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 2026-04-29.