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CVE-2025-29991

Quick assessment

Affected
Yubico YubiKey
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yubico YubiKey是瑞典Yubico公司的一种硬件身份验证设备。 Yubico YubiKey 5.4.1版本至5.7.3版本存在安全漏洞，该漏洞源于FIDO CTAP PIN/UV Auth Protocol Two实现错误，可能导致部分签名验证。

CVSS 2.2 · Low EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1558.003 · Kerberoasting
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I. Basic Information for CVE-2025-29991

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1390
Source: CVE Program / CVE List V5
Vulnerability Title
Yubico YubiKey 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Yubico YubiKey是瑞典Yubico公司的一种硬件身份验证设备。 Yubico YubiKey 5.4.1版本至5.7.3版本存在安全漏洞，该漏洞源于FIDO CTAP PIN/UV Auth Protocol Two实现错误，可能导致部分签名验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Yubico YubiKey 5.4.1 ~ 5.7.4 -

II. Public POCs for CVE-2025-29991

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III. Intelligence Information for CVE-2025-29991

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Vendor Advisories for CVE-2025-29991 (1)

IV. Related Vulnerabilities

Same vendor: Yubico
Same weakness: CWE-1390

V. Comments for CVE-2025-29991

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