The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone®…
Priority LOW 25CWE-203Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-203.
Summary
The elliptic curve cryptography (ECC) hardware accelerator, part of the ARM® TrustZone® CryptoCell 310, contained in the NordicSemiconductor nRF52840 through 2021-03-29 has a non-constant time ECDSA implemenation. This allows an adversary to recover the private ECC key used during an ECDSA operation.
Why it matters now
EPSS 0.00273 19th 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 2021-03-29 | 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 2021-03-29 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-2021-29415
- 2026-10-03 Alias added: GHSA-738r-q8gh-xrrc
References
More Nordicsemi Nrf52840 Firmware vulnerabilities
- TI-2020-16539 Nordic Semiconductor nRF52840 devices through 2020-10-19 have improper protection against… CVSS 3.1MEDIUM 5.7
Sources
- CVE-2021-29415 · CVE Program
- CVE-2021-29415 · NVD
- FIRST EPSS
- GHSA-738r-q8gh-xrrc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences