Memory corruption vulnerability in Rakuraku Hagaki (Rakuraku Hagaki 2018, Rakuraku Hagaki 2017, Rakuraku Hagaki 2016) and Rakuraku Hagaki Select for Ichitaro (Ichitaro 2017, Ichitaro 2016, Ichitaro 2015, Ichitaro Pro3, Ichitaro Pro2, Ichitaro Pro, Ichitaro 2011, Ichitaro Government 8, Ichitaro Government 7, Ichitaro Government 6 and Ichitaro 2017 Trial version) allows attackers to execute arbitrary code with privileges of the application via specially crafted file.

Unspecified vulnerability in JustSystems Ichitaro 2008 through 2011; Ichitaro Government 6, 7, 2008, 2009, and 2010; Ichitaro Pro; Ichitaro Pro 2; Ichitaro 2011 Sou; Ichitaro 2012 Shou; Ichitaro 2013 Gen; and Ichitaro 2014 Tetsu allows remote attackers to execute arbitrary code via a crafted file.

Unspecified vulnerability in JustSystems Ichitaro 2006 through 2011; Ichitaro Government 6, 7, and 2006 through 2010; Ichitaro 2011 Sou; Ichitaro 2012 Shou; Ichitaro 2013 Gen and Gen Trial Edition; Ichitaro Pro; Ichitaro Pro 2 and Pro 2 Trial Edition; Ichitaro Viewer; and Ichitaro Portable with oreplug allows remote attackers to execute arbitrary code via a crafted document.

Buffer overflow in JustSystems Ichitaro 2011 Sou, Ichitaro 2006 through 2011, Ichitaro Government 2006 through 2010, Ichitaro Portable with oreplug, Ichitaro Viewer, JUST School, JUST School 2009 and 2010, JUST Jump 4, JUST Frontier, oreplug, Shuriken Pro4, Shuriken 2007 through 2010, Shuriken Pro4 Corporate Edition, Shuriken CE/2007 through CE/2009 Corporate Edition, Shuriken 2010 Corporate Edition, Rekishimail Sengokubusho no missho, and Bakumatsushishi no missho allows remote attackers to execute arbitrary code via a crafted image file.

JustSystems Ichitaro 2005 through 2011, Ichitaro Government 6, Ichitaro Government 2006 through 2010, Ichitaro Portable, Ichitaro Pro, and Ichitaro Viewer allow remote attackers to execute arbitrary code or cause a denial of service (heap memory corruption) via a crafted document, as exploited in the wild in early 2011.