CVE-2020-27211

Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against...

5.7 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Physical
Complexity: High
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: None

Exploit likelihood

0.30%Down 0.7 points since May 22, 2021

What each source reports

NVD Score used 5.7

Record: CVE-2020-27211
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSS 2.0: 3.3 LowAV:L/AC:M/Au:N/C:P/I:P/A:N
Weakness: CWE-203
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-27211
Updated: 2026-11-02

EUVDEUVD-2020-19730 No score

Record: EUVD-2020-19730
Updated: 2026-11-03

GitHub AdvisoriesGHSA-g62r-h4q8-qx29 5.7

Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against...

Record: GHSA-g62r-h4q8-qx29
CVSS 3.1: 5.7 MediumCVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness: CWE-74, CWE-203
Updated: 2026-11-02

Affected products

nordicsemi nrf52840 firmware

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-27211 is a medium vulnerability (CVSS 5.7) in Nordicsemi Nrf52840 Firmware, published May 21, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.30%, the 22nd percentile. No source names a fixed version.