There was a DLL Hijacking volunerbility in all Astah installers for Windows OSes.
This DLL hijacking vulnerability could allow an unauthenticated remote attacker to run a specific DLL in the background when you
execute the Astah installer if any malicious DLL is in the same folder where Astah installer is.
Mac and Linux packages are not affected by this, only EXE installers. Also, this problem does not affect to you if you already have installed Astah.
We rebuilt all the Astah installers to resolve this DLL Hijacking volunerbility on December 5th, 2019.
Customers who have Astah installers for redistribution or future re-installation, please read the solutions below.