Source: NeworkWorld
Hackers can easily disable the Microsoft Enhanced Mitigation Experience Toolkit (EMET), a free tool used by companies to strengthen their Windows computers and applications against publicly 
known and unknown software exploits.
Researchers from security vendor FireEye have found a method through which exploits can unload EMET-enforced protections by leveraging a legitimate function in the tool itself.
EMET 5.5 download page.
Read more here.