VulnerabilityModified
CVE-2020-27211
Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels.
MEDIUM 5.7EPSS 0.30%
Does this matter?
Lower severity and a low EPSS score (0.30%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.7 MEDIUMCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.30% probability · 22th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-203
- Affected
- nordicsemi/nrf52840 firmware
- Source
- cve@mitre.org
EPSS 0.3% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://eprint.iacr.org/2021/640Third Party Advisory
- https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdfThird Party Advisory
- https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/Third Party Advisory
- https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.htmlThird Party Advisory
- https://www.aisec.fraunhofer.de/en/FirmwareProtection.htmlThird Party Advisory
- https://eprint.iacr.org/2021/640Third Party Advisory
- https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdfThird Party Advisory
- https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/Third Party Advisory
- https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.htmlThird Party Advisory
- https://www.aisec.fraunhofer.de/en/FirmwareProtection.htmlThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.