CVE-2007-5687: Justsystem Ichitaro

High severity, CVSS 9.3. EPSS: 5.7% chance of exploitation in the next 30 days.

Multiple buffer overflows in the rich text processing functionality in JustSystems Ichitaro 2004 through 2007, 11 through 13, and other versions allow remote attackers to execute arbitrary code via a long (1) pard field or (2) font name in the fcharset0 field, which is not properly handled in (a) JSTARO4.OCX; or (3) a long title, which is not properly handled by (b) TJSVDA.DLL.

Affected products

• Justsystem Ichitaro: version 11.0 only; version 12.0 only; version 13.0 only; version 2004 only; version 2005 only; version 2006 only; …

Published 2007-10-28. Last modified 2026-06-16.