CBWinFlash operates at the kernel level to write to SPI flash memory. As a result:

The cbwinflashzip file is a compressed package containing the BIOS update utility for many Dell computers. This tool allows users to update their system's firmware directly from within the Windows environment without needing a bootable USB drive. Downloading the Package

"The zip contains the microcode we need, Sarah," he muttered, his fingers hovering over the Enter key. "If we don't bridge the firmware gap now, the hardware won't survive the next power cycle." He pressed the key.

CbWinFlash.exe /bios biosfile.bin /silent /reboot

Here are the most likely possibilities for what you’re referring to: