VulnerabilityDeferred

CVE-2025-29991

Yubico YubiKey 5.4.1 through 5.7.3 before 5.7.4 has an incorrect FIDO CTAP PIN/UV Auth Protocol Two implementation.

LOW 2.2EPSS 0.12%

Does this matter?

Lower severity and a low EPSS score (0.12%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 2.2 LOWCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
EPSS: 0.12% probability · 2th percentile
CISA KEV: Not listed
Weakness: CWE-1390
Source: cve@mitre.org

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.