vim 6.0 and 6.1, and possibly other versions, allows attackers to execute arbitrary commands using the libcall feature in modelines, which are not sandboxed but may be executed when vim is used to edit a malicious file, as demonstrated using mutt.

VIM before 6.3 and gVim before 6.3 allow local users to execute arbitrary commands via a file containing a crafted modeline that is executed when the file is viewed using options such as (1) termcap, (2) printdevice, (3) titleold, (4) filetype, (5) syntax, (6) backupext, (7) keymap, (8) patchmode, or (9) langmenu.