Lenovo SHAREit before 3.2.0 for Windows and SHAREit before 3.5.48_ww for Android transfer files in cleartext, which allows remote attackers to (1) obtain sensitive information by sniffing the network or (2) conduct man-in-the-middle (MITM) attacks via unspecified vectors.
packetstormsecurity.com/files/135378/Lenovo-ShareIT-Information-Disclosure-Hardcoded-Password.html
seclists.org/fulldisclosure/2016/Jan/67
www.coresecurity.com/advisories/lenovo-shareit-multiple-vulnerabilities
www.securityfocus.com/archive/1/537365/100/0/threaded
support.lenovo.com/us/en/product_security/len_4058