CVE-2006-6400: Justsystem Hanako

Medium severity, CVSS 6.8. EPSS: 3.1% chance of exploitation in the next 30 days.

Buffer overflow in JustSystems Hanako 2004 through 2006, Hanako viewer 1.x, Ichitaro 2004, Ichitaro 2005, Ichitaro Lite2, Ichitaro viewer 4.x, and Sanshiro 2005 allows remote attackers to execute arbitrary code via the (1) Keyword and (2) Title fields, related to string length fields.

Affected products

• Justsystem Hanako: version 2004 only; version 2005 only; version 2006 only
• Justsystem Hanako Viewer: version 1.0 only
• Justsystem Ichitaro: any version; version 2005 only; version 2006 only
• Justsystem Ichitaro LITE2: any version; version r2 only
• Justsystem Ichitaro Viewer: version 4.0 only
• Justsystem Sanshiro: version 2005 only

Published 2006-12-10. Last modified 2026-06-16.