The first 3 words carry the same information as: hackers hacked hackable proprietary code. So just "proprietary code hacked" is enough.
Agreed. Further reduced:
> Proprietary code hack.
(6w/45c -> 3w/22c: >50%)
As it's overwhelmingly code that is hacked, this is nearly lossless:
Proprietary hack
2w/15c
Phack
1w/5c
This is too context dependent to be considered lossless.
You can get rid of 'flawed' since it's implicit in 'exploit'
The word exploit alone is ambiguous since it can also mean roughly “to use.”
I’m quite sure the hackers used HTML with highlighted syntax and filled with CHINESE ideograms in a dark room, typing on a mechanical gaming keyboard, as per the opening image.