7/10 追記
Security updates available for Adobe Flash Player - Adobe Security bulletin APSB13-17
Release Notes | Flash Player® 11.8 AIR® 3.8
なぜか Adobe AIR 3.8 はまだリリースされていない。
7/9/2013 - Flash Player 11.8 Release Announcement - Adobe Community
追記終わり
Flash Player Help / Archived Flash Player versions
Flash Player Help / Uninstall Flash Player | Windows
Flash Player Help / Installation problems | Flash Player | Windows
アンインストーラ uninstall_flash_player.exe 11.8.800.94 の直接リンク
http://download.macromedia.com/get/flashplayer/current/support/uninstall_flash_player.exe
IE用Flash Player ActiveXコントロール インストーラ install_flash_player_ax.exe 11.8.800.94 の直接リンク
http://download.macromedia.com/pub/flashplayer/current/support/install_flash_player_ax.exe
Firefox、Opera用のFlash Player Plugin インストーラ install_flash_player.exe 11.8.800.94 の直接リンク
http://download.macromedia.com/pub/flashplayer/current/support/install_flash_player.exe