Secure Elements Class 5 AVR client (aka C5 EVM) before 2.8.1 does not validate the CEID of an incoming message, which allows remote attackers to send messages to a protected asset without knowing the proper CEID.
https://exchange.xforce.ibmcloud.com/vulnerabilities/26783
http://www.vupen.com/english/advisories/2006/2069
http://www.kb.cert.org/vuls/id/WDON-6Q6SDL
http://www.kb.cert.org/vuls/id/635721