Nearly 90 percent of devices running a vulnerable version of Samba are potentially running version for which there is no direct patch. Samba is an implementation of the SMB/CIFS protocol that lets Unix and Linux systems access Windows file and print services. A malicious client can upload a shared library to a writable share, and then cause the server to load and execute it The vulnerability was introduced seven years ago in version 3.5.0. An attacker can exploit the flaw to target the data stored on the file-share or the storage device.”]
Source: https://www.csoonline.com/article/3198408/patch-the-samba-bug-before-a-network-worm-exploits-it.html