CVE-2006-2781

6.4 MEDIUM 3% exploit odds Fix listed

What it is

Double free vulnerability in nsVCard.cpp in Mozilla Thunderbird before 1.5.0.4 and SeaMonkey before 1.0.2 allows remote attackers to cause a denial of service (hang) and possibly execute arbitrary code via a VCard that contains invalid base64 characters.

At a glance

Exploitability: Can be exploited over the network without logging in. Limited direct impact.
Exploit odds: 3.3% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2006-06-02 19:02 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-16 22:25 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 3.3% in the next 30 days (EPSS).
Severity: 6.4 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2006-06-02 19:02 UTC
Last modified: 2026-06-16 22:25 UTC
Exploit probability: 3.3% · EPSS, next 30 days
Weakness: CWE-119 · Buffer errors
Record status: Modified

Affected

Mozilla Seamonkey ≤ 1.0.1
Mozilla Thunderbird ≤ 1.5.0.3

Attack profile CVSS 2.0 · 6.4

Attack vector: Network
Complexity: Low
Authentication: None
Confidentiality: None
Integrity: Partial
Availability: Partial

Raw vector

AV:N/AC:L/Au:N/C:N/I:P/A:P

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2006-2781.md and follow it. Check whether this project is affected by CVE-2006-2781. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record