CVE-2011-0073

CVE-2011-0073 is a critical-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 70% places it in the 99th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

Description

Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, does not properly use nsTreeRange data structures, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."

Frequently asked questions

What is CVE-2011-0073?
Mozilla Firefox before 3.5.19 and 3.6.x before 3.6.17, and SeaMonkey before 2.0.14, does not properly use nsTreeRange data structures, which allows remote attackers to execute arbitrary code via unspecified vectors that lead to a "dangling pointer."
How severe is CVE-2011-0073?
CVE-2011-0073 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2011-0073 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 70% (99th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-0073?
CVE-2011-0073 primarily affects Mozilla Firefox. In total, 164 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-0073?
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-2011-0073 published?
CVE-2011-0073 was published on 2011-05-07 and last updated on 2026-06-16.

References

Affected products (164)

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