ST-LINK Firmware Upgrade Fails in STM32CubeIDE (V1.15.0/V1.15.1?) - "ST-LINK is not in the DFU mode

Prathik · ‎2025-12-01

Hi everyone,

I'm encountering a critical issue when attempting to debug/flash my STM32 microcontroller using my ST-LINK debugger in STM32CubeIDE.

The Initial Error: When I start a debug session, I receive the pop-up: ST-LINK firmware upgrade required. Please upgrade the ST-LINK firmware using the upgrade tool.

Peter BENSCH · ‎2025-12-01

Welcome @Prathik, to the community!

can you please insert a good photo of your ST-LINK, in case of an ST-LINK/V2 also from the back?

Regards
/Peter

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