Multiple shell programs on various Unix systems, including (1) tcsh, (2) csh, (3) sh, and (4) bash, follow symlinks when processing << redirects (aka here-documents or in-here documents), which allows local users to overwrite files of other users via a symlink attack.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 40.0%