CVE-2011-3665

CVE-2011-3665 is a high-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 7.5. 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-399.

Key facts

Description

Mozilla Firefox 4.x through 8.0, Thunderbird 5.0 through 8.0, and SeaMonkey before 2.6 allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via an Ogg VIDEO element that is not properly handled after scaling.

Frequently asked questions

What is CVE-2011-3665?
Mozilla Firefox 4.x through 8.0, Thunderbird 5.0 through 8.0, and SeaMonkey before 2.6 allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via an Ogg VIDEO element that is not properly handled after scaling.
How severe is CVE-2011-3665?
CVE-2011-3665 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2011-3665 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3665?
CVE-2011-3665 primarily affects Mozilla Firefox. In total, 100 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3665?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-3665 published?
CVE-2011-3665 was published on 2011-12-21 and last updated on 2026-06-16.

References

Affected products (100)

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