How severe is CVE-2014-1549?

CVE-2014-1549 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2014-1549 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2014-1549?

CVE-2014-1549 primarily affects Mozilla Firefox. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2014-1549?

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-2014-1549 published?

CVE-2014-1549 was published on 2014-07-23 and last updated on 2026-06-17.

CVE-2014-1549

CVE-2014-1549 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-119.

Key facts

Severity: Critical (CVSS 2.0 base score 9.3)
EPSS exploit prediction: 6% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Mozilla Firefox
Published: 2014-07-23
Last modified: 2026-06-17

Description

The mozilla::dom::AudioBufferSourceNodeEngine::CopyFromInputBuffer function in Mozilla Firefox before 31.0 and Thunderbird before 31.0 does not properly allocate Web Audio buffer memory, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) via crafted audio content that is improperly handled during playback buffering.

Frequently asked questions

What is CVE-2014-1549?: The mozilla::dom::AudioBufferSourceNodeEngine::CopyFromInputBuffer function in Mozilla Firefox before 31.0 and Thunderbird before 31.0 does not properly allocate Web Audio buffer memory, which allows remote attackers to execute arbitrary code or cause a denial of service (buffer overflow and application crash) via crafted audio content that is improperly handled during playback buffering.
How severe is CVE-2014-1549?: CVE-2014-1549 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2014-1549 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2014-1549?: CVE-2014-1549 primarily affects Mozilla Firefox. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2014-1549?: 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-2014-1549 published?: CVE-2014-1549 was published on 2014-07-23 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:24.6:*:*:*:*:*:*:*

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