CVE-2006-6505: Multiple heap-based buffer overflows in Mozilla Thunderbird before 1.5.0.9 and SeaMonkey before 1.0.7 allow...

Security readout for executives and security teams

This is an old Mozilla mail-suite memory corruption issue. A malicious email or message content with unusually long MIME headers could crash vulnerable clients and may allow code execution. The exposed products named in the bundle are Thunderbird before 1.5.0.9 and SeaMonkey before 1.0.7. Exposure is likely limited to legacy systems running Thunderbird before 1.5.0.9, SeaMonkey before 1.0.7, or older downstream distribution packages that included vulnerable Mozilla mail components. Treat as high priority only where legacy Mozilla mail clients still exist. Modern environments are unlikely to be exposed, but old desktops, lab machines, or unmanaged systems should be checked because the impact is code execution. Mitigation focus: Upgrade Thunderbird to 1.5.0.9 or later if still present.; Upgrade SeaMonkey to 1.0.7 or later if still present.; Apply fixed vendor or Linux distribution packages for affected Mozilla components..

Prepared

Jun 29, 2026, 08:45 UTC (UTC+00:00)

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