Buffer overflow in Hancom Office 2010 SE allows remote attackers to execute arbitrary via a long string in the Text attribute in a TEXTART XML element in an HML file.
https://exchange.xforce.ibmcloud.com/vulnerabilities/89871
http://www.securityfocus.com/bid/88211
http://archives.neohapsis.com/archives/bugtraq/2013-12/0100.html