In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/html/axis-cgi/local_del.cgi line 8:

	local file

        ^--------^ SC3043 (warning): In POSIX sh, 'local' is undefined.

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/html/axis-cgi/local_del.cgi line 10:

	for file in $*; do

                    ^-- SC2048 (warning): Use "$@" (with quotes) to prevent whitespace problems.

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/html/axis-cgi/local_del.cgi line 11:

		expr $file : '\(/usr/html/local/\(viewer\|operator\|administrator\)/[^/]\+$\)' >/dev/null || continue

                     ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

		expr "$file" : '\(/usr/html/local/\(viewer\|operator\|administrator\)/[^/]\+$\)' >/dev/null || continue

In /logs/firmware/unblob_extracted/firmware_extract/4325012-58052244.squashfs_v4_le_extract/usr/html/axis-cgi/local_del.cgi line 13:

		rm -f $file || {

                      ^---^ SC2086 (info): Double quote to prevent globbing and word splitting.

Did you mean: 

		rm -f "$file" || {

For more information:

  https://www.shellcheck.net/wiki/SC2048 -- Use "$@" (with quotes) to prevent...

  https://www.shellcheck.net/wiki/SC3043 -- In POSIX sh, 'local' is undefined.

  https://www.shellcheck.net/wiki/SC2086 -- Double quote to prevent globbing ...