I will never go out of business in this country. thanks to Microsoft. who would have thought that wincalcis vulnerable? I have not checked all systems yet, so this is my configuration: Windows 7 Ultimate SP1 x86-64, English. 1) run calc.exe; 2) press “Alt-2″ to go to “Scientistic” mode (”Programmer” mode works too); 3) type “1/255″ and press [...]

http://nezumi-lab.org/blog/?p=239

1. That's not a vulnerability. That's a (non-security) bug.
2. That was discovered years ago: http://answers.microsoft.com/en-us/windows/forum/windows_7-windows_programs/1365-in-f-e-mode-in-scientific-mode-in-calculator/50cd330f-4cbe-435e-94f7-389016202270