10/27 追記
Security updates available for Adobe Flash Player - Adobe Security Bulletin APSB16-36
追記終わり
Release Notes | Flash Player 23 AIR 23
Flash Player Help / Archived Flash Player versions
Flash Player Help / Uninstall Flash Player | Windows
Flash Player Help / Installation problems | Flash Player | Windows 7 and earlier
Flash Player Help / Flash Player issues | Windows 8
Flash Player Issues | Windows 10 | Microsoft Edge
アンインストーラ uninstall_flash_player.exe 23.0.0.205 の直接リンク
https://fpdownload.macromedia.com/get/flashplayer/current/support/uninstall_flash_player.exe
Windows 7 以前の IE用 Flash Player ActiveXコントロール インストーラ install_flash_player_ax.exe 23.0.0.205 の直接リンク
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_ax.exe
Firefox 用 NPAPI Flash Player Plugin インストーラ install_flash_player.exe 23.0.0.205 の直接リンク
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player.exe
Chromium ベースのブラウザ用 PPAPI Flash Player Plugin インストーラ install_flash_player_ppapi.exe 23.0.0.205 の直接リンク
https://fpdownload.macromedia.com/pub/flashplayer/latest/help/install_flash_player_ppapi.exe