CyberArk says the manner in which Defender scans for malicious executables in SMB shares gives attackers an opening.
Article Link: https://www.darkreading.com/perimeter/weakness-in-windows-defender-lets-malware-slip-through-via-smb-shares/d/d-id/1330021?_mc=rss_x_drr_edt_aud_dr_x_x-rss-simple