What’s Vulnerable › Vulnerabilities
CVE-2025-29991
- Severity: low (CVSS 2.2 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-04-03 · updated 2026-06-17
- Weakness: CWE-1390
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.
Affected products
- Yubico YubiKey: from 5.4.1 before 5.7.4 — fixed in 5.7.4
How to fix
Upgrade to a fixed version: Yubico YubiKey 5.7.4. Check the vendor advisory for mitigations.
References
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