Untrusted search path vulnerability in Installer of HIBUN Confidential File Viewer prior to 11.20.0001 allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
https://jvn.jp/en/jp/JVN94056834/index.html
http://www.hitachi-solutions.co.jp/hibun/sp/support/importance/20170929.html