Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against…
Priority LOW 25CWE-203Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-203.
Summary
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.
Why it matters now
EPSS 0.00296 22nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 2
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:nordicsemi:nrf52840_firmware:*:*:*:*:*:*:*:* | up to 2020-10-19 | Vulnerable | Nordicsemi |
| cpe:2.3:h:nordicsemi:nrf52840:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nordicsemi |
- cpe:2.3:o:nordicsemi:nrf52840_firmware:*:*:*:*:*:*:*:* Versions up to 2020-10-19 Vulnerable ·Nordicsemi
- cpe:2.3:h:nordicsemi:nrf52840:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nordicsemi
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27211
- 2026-10-03 Alias added: GHSA-g62r-h4q8-qx29
References
Advisory 5
- https://www.aisec.fraunhofer.de/en/FirmwareProtection.html
- https://eprint.iacr.org/2021/640
- https://limitedresults.com/2020/06/nrf52-debug-resurrection-approtect-bypass/
- https://infocenter.nordicsemi.com/pdf/in_133_v1.0.pdf
- https://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
More Nordicsemi Nrf52840 Firmware vulnerabilities
- TI-2021-10133 The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone®… CVSS 3.1MEDIUM 5.5
Sources
- CVE-2020-27211 · CVE Program
- CVE-2020-27211 · NVD
- FIRST EPSS
- GHSA-g62r-h4q8-qx29 · GitHub Advisory Database · CC BY 4.0
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