CVE-2020-27211 json
Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against physical side channels.
published 2021-05-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-19730
- cvss
- 5.7
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 22%
- public exploits
- 0
- none known
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.
Exploit prediction
0.30% chance of exploitation in the next 30 days, higher than 22% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 5.7 | CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 3.3 | AV:L/AC:M/Au:N/C:P/I:P/A:N |
Classification
- Weakness
-
- CWE-203 Observable Discrepancy
References
-
aisec.fraunhofer.de
/en/FirmwareProtection.html
third-party-advisory
-
eprint.iacr.org
/2021/640
third-party-advisory
-
limitedresults.com
/2020/06/nrf52-debug-resurrection-approtect-bypass/
third-party-advisory
-
infocenter.nordicsemi.com
/pdf/in_133_v1.0.pdf
third-party-advisory
-
aisec.fraunhofer.de
/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.html
third-party-advisory
Sources
- CVE List CVE-2020-27211
- NVD CVE-2020-27211
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.