Corrupting the OS's memory is rarely a problem. It's corrupting your application's memory that's a major problem, and that's still very easy to do on modern hardware with "modern" development techniques.
People in the finance industry treat C++ like they were abandoned as children in the woods, and C++ brought them to its home, fed them, raised them, and sent them to college. Someone I work with claims that Stroustrup is God.
If you're an exchange or some other data source and you want to compromise a shit-ton of machines, start sending invalid messages to the banks. You will have a botnet in about three nanoseconds.