The output is placed inside the ISO9660 file system binary format thus it may not be suitable for binary content as is, yet it can be mounted or extracted with tools like
It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system.
LFILE=file_to_read genisoimage -q -o - "$LFILE"
It runs in privileged context and may be used to access the file system, escalate or maintain access with elevated privileges if enabled on
LFILE=file_to_read sudo genisoimage -q -o - "$LFILE"