CVE-2020-27211: Nordicsemi NRF52840 Firmware

Medium severity, CVSS 5.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels. The flash read-out protection (APPROTECT) can be bypassed by injecting a fault during the boot phase.

Affected products

• Nordicsemi NRF52840 Firmware: up to and including 2020-10-19

Published 2021-05-21. Last modified 2026-06-17.