CCH Wolters Kluwer ProSystem fx Engagement (aka PFX Engagement) 7.1 and earlier uses weak permissions (Authenticated Users: Modify and Write) for the (1) Pfx.Engagement.WcfServices, (2) PFXEngDesktopService, (3) PFXSYNPFTService, and (4) P2EWinService service files in PFX Engagement\, which allows local users to obtain LocalSystem privileges via a Trojan horse file.