Performance Center is using the "Microsoft Report Viewer" control when generating the Admin Reports.
The files used by Performance Center are taken from the "Microsoft Report Viewer 2008
Redistributable Package" and are installed to the '\PCWEB\bin' folder.
It is highly recommended that the 'Microsoft Report Viewer' control, on the Performance Center machine, is updated with "Microsoft Report Viewer 2008 SP1
For more details, see https://technet.microsoft.com/library/security/ms11-067