How severe is CVE-2010-3777?

CVE-2010-3777 has a CVSS 2.0 base score of 9.3, rated critical severity.

Is CVE-2010-3777 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-3777?

CVE-2010-3777 primarily affects Mozilla Firefox. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-3777?

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-2010-3777 published?

CVE-2010-3777 was published on 2010-12-10 and last updated on 2026-06-16.

CVE-2010-3777

CVE-2010-3777 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: 8% (94th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Mozilla Firefox
Published: 2010-12-10
Last modified: 2026-06-16

Description

Unspecified vulnerability in Mozilla Firefox 3.6.x before 3.6.13 and Thunderbird 3.1.x before 3.1.7 allows 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-2010-3777?: Unspecified vulnerability in Mozilla Firefox 3.6.x before 3.6.13 and Thunderbird 3.1.x before 3.1.7 allows 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-2010-3777?: CVE-2010-3777 has a CVSS 2.0 base score of 9.3, rated critical severity.
Is CVE-2010-3777 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 8% (94th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3777?: CVE-2010-3777 primarily affects Mozilla Firefox. In total, 19 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-3777?: 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-2010-3777 published?: CVE-2010-3777 was published on 2010-12-10 and last updated on 2026-06-16.

References

Affected products (19)

cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.11:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.12:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:3.1.6:*:*:*:*:*:*:*

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