The Personal Firewall driver (aka epfw.sys) 3.0.672.0 and earlier in ESET Smart Security 3.0.672 and earlier allows local users to gain privileges via a crafted IRP in a certain METHOD_NEITHER IOCTL request to \Device\Epfw that overwrites portions of memory.
Exploitability
AV:LAC:LAu:NImpact
C:CI:CA:C7.2/AV:L/AC:L/Au:N/C:C/I:C/A:C