because i can

[IzNoGoD]

Would love to tell you, but I won't.

EDIT:
The client itself doesn't have to do anything, upon connecting or whenever u want (in the gif upon playerspawn) you can do it.

As i see it, the server forces the client to execute said .exe file, aka remote execution, virus-worthy.

[php]

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[iBuddie]

One form of this vulnerability has already been made public in 2006 (by Luigi Auriemma). I'm not sure if you followed the same approach, but it does not matter as long as you do not release a PoC or other kinds of detailed information about the vulnerability - there is always guys who abuse it!

Fortunately, most do not know the major (unpatched) security leaks of the older Call of Duty series, which would make it unplayable. Better keep it like that

[php]

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[Selbie]

I wonder if you have used the exploit(s) I found inside cod2.
One of them was also possible to run arbitrary code on clients.

Should be kept secret or patched.