How severe is CVE-2010-3400?

CVE-2010-3400 has a CVSS 2.0 base score of 5.8, rated medium severity.

Is CVE-2010-3400 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2010-3400?

CVE-2010-3400 primarily affects Mozilla Firefox. In total, 57 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2010-3400?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2010-3400 published?

CVE-2010-3400 was published on 2010-09-15 and last updated on 2026-06-16.

CVE-2010-3400

CVE-2010-3400 is a medium-severity vulnerability in Mozilla Firefox with a CVSS 2.0 base score of 5.8. 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-310.

Key facts

Severity: Medium (CVSS 2.0 base score 5.8)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Mozilla Firefox
Published: 2010-09-15
Last modified: 2026-06-16

Description

The js_InitRandom function in the JavaScript implementation in Mozilla Firefox 3.5.x before 3.5.10 and 3.6.x before 3.6.4, and SeaMonkey before 2.0.5, uses the current time for seeding of a random number generator, which makes it easier for remote attackers to guess the seed value via a brute-force attack, a different vulnerability than CVE-2008-5913.

Frequently asked questions

What is CVE-2010-3400?: The js_InitRandom function in the JavaScript implementation in Mozilla Firefox 3.5.x before 3.5.10 and 3.6.x before 3.6.4, and SeaMonkey before 2.0.5, uses the current time for seeding of a random number generator, which makes it easier for remote attackers to guess the seed value via a brute-force attack, a different vulnerability than CVE-2008-5913.
How severe is CVE-2010-3400?: CVE-2010-3400 has a CVSS 2.0 base score of 5.8, rated medium severity.
Is CVE-2010-3400 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2010-3400?: CVE-2010-3400 primarily affects Mozilla Firefox. In total, 57 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2010-3400?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2010-3400 published?: CVE-2010-3400 was published on 2010-09-15 and last updated on 2026-06-16.

References

Affected products (57)

cpe:2.3:a:mozilla:firefox:3.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.5.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:firefox:3.6.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:*:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:alpha:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:beta:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1:alpha:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1:beta:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.6:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.7:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.8:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.9:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.10:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.1.11:*:*:*:*:*:*:*

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