CVE-2006-3806: Multiple integer overflows in the Javascript engine in Mozilla Firefox before 1.5.0.5, Thunderbird before 1...

Security readout for executives and security teams

This is an old Mozilla JavaScript engine flaw affecting Firefox before 1.5.0.5, Thunderbird before 1.5.0.5, and SeaMonkey before 1.0.3. Malicious remote content could trigger integer overflows and potentially run code. Exposure is mainly legacy systems still running these obsolete clients. Most modern environments should have low practical exposure, but legacy endpoints, old Linux distributions, kiosk systems, frozen images, or archived Thunderbird/Firefox installations may still be affected. The bundle lists affected CPE data as unavailable, so validate by installed product and version. Prioritize this only where legacy Mozilla software exists. It is old, but the stated impact is arbitrary code execution from remote content, which is serious for unmanaged or unsupported systems. For current environments, focus on confirming absence rather than emergency response. Mitigation focus: Upgrade Firefox to 1.5.0.5 or later if present.; Upgrade Thunderbird to 1.5.0.5 or later if present.; Upgrade SeaMonkey to 1.0.3 or later if present..

Prepared

Jun 29, 2026, 11:25 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.