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Aziz BRIGUI
ST Technical Moderator
November 17, 2025
Question

STM32CubeProgrammer v2.21 released

We are pleased to announce that STM32CubeProgrammer 2.21 is available

What is new in 2.21:

• Support for the STM32WL3Rxx microcontrollers:

        – Internal memory programming
        – Option byte and OTP programming
        – PKCS#11
        – Firmware authentication

• STM32MP21x microprocessors: SSP support on Linux®
• STM32WBA6xxG microcontrollers: Support for 1-Mbyte flash memory size
• Support for new devices in the STM32C0 series: STM32C011xx, STM32C031xx, STM32C051xx, STM32C071xx, STM32C091xx, and STM32C092xx microcontrollers

• Support for the factory reset of option bytes:
        – STM32WBA5xxx and STM32WBA6xxx microcontrollers

        – STM32U375/385 microcontrollers
• Dynamic upgrade of components
• Support for SWD multi-drop
• Fast read new CLI command

Main fixed issues in 2.21:

Refer to the STM32CubeProgrammer wiki at:

STM32CubeProgrammer errata 2.21.x - stm32mcu

Known problems and limitations in 2.21:

Refer to the STM32CubeProgrammer wiki at:

STM32CubeProgrammer errata 2.21.x - stm32mcu

How to get STM32CubeProgrammer 2.21:

  • Under this link
  • Or update your current installation of STM32CubeProgrammer using: Help > Software update
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