https://support.citrix.com/external/article/134524/hdx-mediastream-hotfix-hdxflash110wx6400.html
HDX MediaStream Hotfix HDXFlash110WX64006 - For Citrix XenApp 4.5, 5.0 and 6.0 for Windows x64...
HDX MediaStream Hotfix HDXFlash110WX64006 - For Citrix XenApp 4.5, 5.0 and 6.0 for Windows x64 Server - English