The latest versions of Tableau Firmware Update (TFU):

UltraBay / UltraBlock / TX1 (v24.3) - https://digitalintelligence.com/files/setup_tableau_firmware_update_24.3.msi

TX2 (v25.2) - https://digitalintelligence.com/files/tx2-firmware-25.2.0.28-cb5febd709.tx2_pkg

TD4 (v24.3) - https://digitalintelligence.com/files/opentext_tableau_forensic_td4_firmware_pkg_24.3.td4_pkg