zlacker

If you can trick someone into installing the font, you can now control what they read. Unfortunately a lot of hacks involve the user doing something dumb and avoidable.

If this font format is successful, then given enough time, it will become legacy. People won't be as vigilant about it, and they won't understand the internals as well. This is why TIFF-based exploits became so common 20-30 years after TIFF's heyday.