Technical Advisory – SonicWall SMA 100 Series – Unauthenticated File Upload Path Traversal (CVE-2021-20040) | NCC Group Research Blog | Making the world safer and more secure
https://research.nccgroup.com/2021/12/09/technical-advisory-sonicwall-sma-100-series-unauthenticated-file-upload-path-traversal-cve-2021-20040/