Attackers can turn Microsoft's exploit defense tool EMET against itself

http://www.pcworld.com/article/3037009/security/attackers-can-turn-microsofts-exploit-defense-tool-emet-against-itself.html

"Exploits can trigger a specific function in EMET that disables all protections it enforces for other applications"

"Since this technique is now public, EMET users should consider upgrading to version 5.5 as soon as possible to avoid future attacks that might adopt it. In addition to Windows 10 compatibility, this new EMET version improves the configuration and management of protections through Group Policy and improves the performance for the EAF and EAF+ mitigations."