Secure Elements Class 5 AVR (aka C5 EVM) before 2.8.1 do not validate the source address of a message, which allows remote attackers to (1) execute arbitrary code on a client or (2) forge messages to the server.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26747
http://www.vupen.com/english/advisories/2006/2069
http://www.kb.cert.org/vuls/id/WDON-6QANK7
http://www.kb.cert.org/vuls/id/WDON-6Q6RYL
http://www.kb.cert.org/vuls/id/919345
http://www.kb.cert.org/vuls/id/288121