Wrote a command line fuzzer (originally forfuzzing *nix setuid binaries),
running it on windows gave astonishing results almost every third
commandline application crashed for example expand.exe,extrac32.exe,fontview.exe,evetvwr.exe.
(only one of them poses a real threat can you guess ?)
I wonder what microsoft is upto.

The fuzzer is at
http://warl0ck.cjb.net/clfuzz.py