There is a stack buffer overflow in a Rockwell Automation application that s used to enable communications in industrial control applications used in manufacturing, energy, water,and other environments. The vulnerability is in the RSLinx Classic product and it can be used to crash the application or run arbitrary code. The bug is not exploitable remotely and there is some social engineering needed in order to exploit it. The advisory says that no public exploits are known to exist for this vulnerability and that exploiting it would be difficult.
Source: https://threatpost.com/rockwell-automation-patches-buffer-overflow-in-ics-app/112701/