CVE-2025-29991

Description

Yubico YubiKey 5.4.1 through 5.7.3 before 5.7.4 has an incorrect FIDO CTAP PIN/UV Auth Protocol Two implementation. It uses the signature length from CTAP PIN/UV Auth Protocol One, even when CTAP PIN/UV Auth Protocol Two was chosen, resulting in a partial signature verification.

Category

2.2
CVSS
Severity: Low
CVSS 3.1 •
EPSS 0.01%
Affected: Yubico YubiKey
Published at:
Updated at:

References

Link Tags
https://www.yubico.com/support/security-advisories/ysa-2025-02/

Frequently Asked Questions

What is the severity of CVE-2025-29991?
CVE-2025-29991 has been scored as a low severity vulnerability.
How to fix CVE-2025-29991?
To fix CVE-2025-29991, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-29991 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-29991 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-29991?
CVE-2025-29991 affects Yubico YubiKey.
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