CVE-2025-29991
LOW
2.2
CVSS Score
Published: April 3, 2025 at 12:00 AM UTC
Updated: June 17, 2026 at 09:06 AM UTC
1 product affected across 1 vendorYubiKey
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Severity
LOW2.2
Exploit prediction
EPSS 0.1%
SSVC
No known exploit
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.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.
References (1)
SSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
2.2LOWmitre
Vector?
Quick Info
StatusDEFERRED
CWE
CWE-1390
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