What’s Vulnerable › Vulnerabilities

CVE-2020-15001

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-07-09 · updated 2026-06-17
• Weakness: CWE-862

Description

An information leak was discovered on Yubico YubiKey 5 NFC devices 5.0.0 to 5.2.6 and 5.3.0 to 5.3.1. The OTP application allows a user to set optional access codes on OTP slots. This access code is intended to prevent unauthorized changes to OTP configurations. The access code is not checked when updating NFC specific components of the OTP configurations. This may allow an attacker to access configured OTPs and passwords stored in slots that were not configured by the user to be read over NFC, despite a user having set an access code. (Users who have not set an access code, or who have not configured the OTP slots, are not impacted by this issue.)

Affected products

• Yubico Yubikey 5 Nfc Firmware: from 5.0.0 through 5.2.6; from 5.3.0 through 5.3.1

References

• https://www.yubico.com/support/security-advisories/ysa-2020-04/
• https://www.yubico.com/support/security-advisories/ysa-2020-04/

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