CVE-2011-0053

CVE-2011-0053 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Description

Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, Thunderbird before 3.1.8, and SeaMonkey before 2.0.12 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.

Frequently asked questions

What is CVE-2011-0053?
Multiple unspecified vulnerabilities in the browser engine in Mozilla Firefox before 3.5.17 and 3.6.x before 3.6.14, Thunderbird before 3.1.8, and SeaMonkey before 2.0.12 allow remote attackers to cause a denial of service (memory corruption and application crash) or possibly execute arbitrary code via unknown vectors.
How severe is CVE-2011-0053?
CVE-2011-0053 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-0053 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-2011-0053?
CVE-2011-0053 primarily affects Mozilla Firefox. In total, 238 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0053?
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-2011-0053 published?
CVE-2011-0053 was published on 2011-03-02 and last updated on 2026-06-16.

References

Affected products (238)

More vulnerabilities in Mozilla Firefox

All CVEs affecting Mozilla Firefox →