Check out this post by Markus Nöbauer on problems installing KB2592525 on OfficeWebAppsServer: Office Web Apps Server – KB2592525 Installation failed.
Teams, Skype4B, Exchange & O365 Technical
Check out this post by Markus Nöbauer on problems installing KB2592525 on OfficeWebAppsServer: Office Web Apps Server – KB2592525 Installation failed.