01 Record

CVE-2020-27208

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

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

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02 Description

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

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 0.32% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 25.6% of scored records. A rank, not a probability.
NVD base score: 6.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-05-21 11:17Z5 YR AGO

Last updated

2024-08-04 16:11Z2 YR AGO

Reserved

2020-10-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-326Inadequate Encryption StrengthClass

Data version

5.1

Document digest

5c6874e3b0b9283f14dad07eff24894e327ccd0218f0a672a1f8389a13a3623f

05 Affected products

VendorProductVersionsPlatforms

nitrokeyfido2Not specified—

nitrokeyfido2_firmwareNot specified—

solokeyssoloNot specified—

solokeyssolo_firmwareNot specified—

solokeyssomuNot specified—

solokeyssomu_firmwareNot specified—

06 References

www.aisec.fraunhofer.dehttps://www.aisec.fraunhofer.de/en/FirmwareProtection.htmlx_refsource_MISC
twitter.comhttps://twitter.com/SoloKeysSecx_refsource_MISC
solokeys.comhttps://solokeys.comx_refsource_MISC
eprint.iacr.orghttps://eprint.iacr.org/2021/640x_refsource_MISC
github.comhttps://github.com/solokeys/solo/commit/a9c02cd354f34b48195a342c7f524abdef5cbcecx_refsource_MISC
www.aisec.fraunhofer.dehttps://www.aisec.fraunhofer.de/de/das-institut/wissenschaftliche-exzellenz/security-and-trust-in-open-source-security-tokens.htmlx_refsource_MISC