Vulnerability Description
Nitrokey 3 Firmware is the the firmware of Nitrokey 3 USB keys. For release 1.8.0, and test releases with PIV enabled prior to 1.8.0, the PIV application could accept invalid keys for authentication of the admin key. This could lead to compromise of the integrity of the data stored in the application. An attacker without access to the proper administration key would be able to generate new keys and overwrite certificates. Such an attacker would not be able to read-out or extract existing private data, nor would they be able to gain access to cryptographic operations that would normally require PIN-based authentication. The issue is fixed in piv-authenticator 0.3.9, and in Nitrokey's firmware 1.8.1.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/Nitrokey/nitrokey-3-firmware/releases/tag/v1.8.1
- https://github.com/Nitrokey/nitrokey-3-firmware/security/advisories/GHSA-jfhm-pp
- https://www.nitrokey.com/blog/2025/nitrokey-3-firmware-v181-security-update
FAQ
What is CVE-2025-25201?
CVE-2025-25201 is a vulnerability with a CVSS score of 4.0 (MEDIUM). Nitrokey 3 Firmware is the the firmware of Nitrokey 3 USB keys. For release 1.8.0, and test releases with PIV enabled prior to 1.8.0, the PIV application could accept invalid keys for authentication o...
How severe is CVE-2025-25201?
CVE-2025-25201 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-25201?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.