How severe is CVE-2006-3804?

CVE-2006-3804 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2006-3804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-3804?

CVE-2006-3804 primarily affects Mozilla Seamonkey. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-3804?

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

When was CVE-2006-3804 published?

CVE-2006-3804 was published on 2006-07-27 and last updated on 2026-06-16.

CVE-2006-3804

CVE-2006-3804 is a medium-severity vulnerability in Mozilla Seamonkey with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mozilla Seamonkey
Published: 2006-07-27
Last modified: 2026-06-16

Description

Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) via a VCard attachment with a malformed base64 field, which copies more data than expected due to an integer underflow.

Frequently asked questions

What is CVE-2006-3804?: Heap-based buffer overflow in Mozilla Thunderbird before 1.5.0.5 and SeaMonkey before 1.0.3 allows remote attackers to cause a denial of service (crash) via a VCard attachment with a malformed base64 field, which copies more data than expected due to an integer underflow.
How severe is CVE-2006-3804?: CVE-2006-3804 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2006-3804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-3804?: CVE-2006-3804 primarily affects Mozilla Seamonkey. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-3804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-3804 published?: CVE-2006-3804 was published on 2006-07-27 and last updated on 2026-06-16.

References

Affected products (7)

cpe:2.3:a:mozilla:seamonkey:1.0:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0:*:dev:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:seamonkey:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:mozilla:thunderbird:1.5.0.4:*:*:*:*:*:*:*

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