How severe is CVE-2014-1556?

CVE-2014-1556 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2014-1556 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-1556?

CVE-2014-1556 primarily affects Mozilla Firefox. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-1556?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2014-1556 published?

CVE-2014-1556 was published on 2014-07-23 and last updated on 2026-06-17.

CVE-2014-1556

CVE-2014-1556 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 9.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-94.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-94
Affected product: Mozilla Firefox
Published: 2014-07-23
Last modified: 2026-06-17

Description

Mozilla Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7 allow remote attackers to execute arbitrary code via crafted WebGL content constructed with the Cesium JavaScript library.

Frequently asked questions

What is CVE-2014-1556?: Mozilla Firefox before 31.0, Firefox ESR 24.x before 24.7, and Thunderbird before 24.7 allow remote attackers to execute arbitrary code via crafted WebGL content constructed with the Cesium JavaScript library.
How severe is CVE-2014-1556?: CVE-2014-1556 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2014-1556 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-1556?: CVE-2014-1556 primarily affects Mozilla Firefox. In total, 20 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-1556?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2014-1556 published?: CVE-2014-1556 was published on 2014-07-23 and last updated on 2026-06-17.

References

Affected products (20)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:24.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:24.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:24.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:24.1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:24.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:24.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:24.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:24.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:24.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox_esr:24.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.5:*:*:*:*:*:*:*

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