The flash read-out protection (RDP) level is not enforced during the device…
Priority LOW 30CWE-326Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-326.
Summary
The flash read-out protection (RDP) level is not enforced during the device initialization phase of the SoloKeys Solo 4.0.0 & Somu and the Nitrokey FIDO2 token. This allows an adversary to downgrade the RDP level and access secrets such as private ECC keys from SRAM via the debug interface.
Why it matters now
EPSS 0.00328 26th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
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 · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:solokeys:solo_firmware:4.0.0:*:*:*:*:*:*:* | 4.0.0 | Vulnerable | Solokeys |
| cpe:2.3:h:solokeys:solo:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Solokeys |
| cpe:2.3:o:solokeys:somu_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Solokeys |
| cpe:2.3:h:solokeys:somu:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Solokeys |
| cpe:2.3:o:nitrokey:fido2_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Nitrokey |
| cpe:2.3:h:nitrokey:fido2:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Nitrokey |
- cpe:2.3:o:solokeys:solo_firmware:4.0.0:*:*:*:*:*:*:* Versions 4.0.0 Vulnerable ·Solokeys
- cpe:2.3:h:solokeys:solo:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Solokeys
- cpe:2.3:o:solokeys:somu_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Solokeys
- cpe:2.3:h:solokeys:somu:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Solokeys
- cpe:2.3:o:nitrokey:fido2_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Nitrokey
- cpe:2.3:h:nitrokey:fido2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Nitrokey
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27208
- 2026-10-03 Alias added: GHSA-m4fc-4f5m-5hhw
References
Advisory 2
Sources
- CVE-2020-27208 · CVE Program
- CVE-2020-27208 · NVD
- FIRST EPSS
- GHSA-m4fc-4f5m-5hhw · 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