CVE-2020-12789: Microchip ATSAMA5D21C-Cu Firmware

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

The Secure Monitor in Microchip Atmel ATSAMA5 products use a hardcoded key to encrypt and authenticate secure applets.

Affected products

Microchip ATSAMA5D21C-Cu Firmware: affected versions not specified
Microchip ATSAMA5D21C-Cur Firmware: affected versions not specified
Microchip ATSAMA5D225C-d1m-Cur Firmware: affected versions not specified
Microchip ATSAMA5D22C-Cn Firmware: affected versions not specified
Microchip ATSAMA5D22C-Cnr Firmware: affected versions not specified
Microchip ATSAMA5D22C-Cu Firmware: affected versions not specified
Microchip ATSAMA5D22C-Cur Firmware: affected versions not specified
Microchip ATSAMA5D23C-Cn Firmware: affected versions not specified
Microchip ATSAMA5D23C-Cnr Firmware: affected versions not specified
Microchip ATSAMA5D23C-Cu Firmware: affected versions not specified
Microchip ATSAMA5D23C-Cur Firmware: affected versions not specified
Microchip ATSAMA5D24C-Cu Firmware: affected versions not specified
Microchip ATSAMA5D24C-Cuf Firmware: affected versions not specified
Microchip ATSAMA5D24C-Cur Firmware: affected versions not specified
Microchip ATSAMA5D26C-Cn Firmware: affected versions not specified
Microchip ATSAMA5D26C-Cnr Firmware: affected versions not specified
Microchip ATSAMA5D26C-Cu Firmware: affected versions not specified
Microchip ATSAMA5D26C-Cur Firmware: affected versions not specified
Microchip ATSAMA5D27-SOM1 Firmware: affected versions not specified
Microchip ATSAMA5D27-WLSOM1 Firmware: affected versions not specified
Microchip ATSAMA5D27C-Cn Firmware: affected versions not specified
Microchip ATSAMA5D27C-Cnr Firmware: affected versions not specified
Microchip ATSAMA5D27C-Cnrvao Firmware: affected versions not specified
Microchip ATSAMA5D27C-Cnvao Firmware: affected versions not specified
Microchip ATSAMA5D27C-Cu Firmware: affected versions not specified
and 51 more

Published 2020-09-14. Last modified 2026-06-17.