Some vulnerabilities have been reported in Adobe Flash Player, which can be exploited by malicious, local users to disclose sensitive information and potentially gain escalated privileges, and by malicious people to bypass certain security restrictions, disclose potentially sensitive information, and compromise a user’s system. Read more at Secunia.com
First of all you have to download the newest Adobe Flash Player MSI. Aaron Parker have written a nice blog about the Adobe Flash and Shockwave Player download links.
Here is an example of an unattended script :
REM Install Adobe Flash Player 10.0.22.87
REM ScriptFrameWork by Joe Shonk – www.theshonkproject.com
REM Customized by Trond Eirik Haavarstein – www.xenappblog.com
set LogFile="%temp%Adobe Flash Player 10.0.22.87.log"
set Switches=/qn ALLUSERS=1 REBOOT="ReallySuppress"
echo Installing Adobe Flash Player 10.0.22.87
start /wait msiexec /i "install_flash_player_10_active_x.msi" %Switches% /liewa %LOGFILE%