A vulnerability in the web management interface of FatPipe WARP, IPVPN, and MPVPN software prior to versions 10.1.2r60p92 and 10.2.2r44p1 allows a remote, unauthenticated attacker to upload a file to any location on the filesystem. The FatPipe advisory identifier for this vulnerability is FPSA006.
https://fortifydata.com/blog/cve-2019-1653-cve-2019-1652-cve-2021-40539-cve-2021-27860-volt-typhoon/
https://www.tenable.com/blog/volt-typhoon-cybersecurity-advisory
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-144a
https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective