Stack-based buffer overflow in BreakPoint Software Hex Workshop 4.23, 6.0.1.4603, and other 6.x and earlier versions allows remote attackers to execute arbitrary code via a crafted Intel Hex Code (.hex) file. NOTE: some of these details are obtained from third party information.
https://www.exploit-db.com/exploits/8121
https://exchange.xforce.ibmcloud.com/vulnerabilities/48970
http://www.securityfocus.com/archive/1/501300/100/0/threaded