CVE-2007-3954: Microsoft Internet Explorer

Medium severity, CVSS 4.3. EPSS: 6.7% chance of exploitation in the next 30 days.

Argument injection vulnerability in Microsoft Internet Explorer, when running on systems with SeaMonkey installed and certain URIs registered, allows remote attackers to conduct cross-browser scripting attacks and execute arbitrary commands via shell metacharacters in a mailto URI, which are inserted into the command line that is created when invoking SeaMonkey.exe, a related issue to CVE-2007-3670.

Affected products

• Microsoft Internet Explorer: any version
• Mozilla Seamonkey: any version

Published 2007-07-24. Last modified 2026-06-16.