Buffer overflow in Corel Paint Shop Pro 11.20 allows user-assisted remote attackers to execute arbitrary code via a crafted .PNG file.
https://www.exploit-db.com/exploits/3812
https://exchange.xforce.ibmcloud.com/vulnerabilities/33956
http://www.vupen.com/english/advisories/2007/1576
http://www.securityfocus.com/bid/23698