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CVE-2020-15000

MEDIUM
5.9
CVSS Score
Published: July 9, 2020 at 05:57 PM UTC
Updated: June 17, 2026 at 02:55 AM UTC
2 products affected across 1 vendorYubikey 5 Nfc FirmwareYubikey 5 Nfc

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.7%

Description

A PIN management problem was discovered on Yubico YubiKey 5 devices 5.2.0 to 5.2.6. OpenPGP has three passwords: Admin PIN, Reset Code, and User PIN. The Reset Code is used to reset the User PIN, but it is disabled by default. A flaw in the implementation of OpenPGP sets the Reset Code to a known value upon initialization. If the retry counter for the Reset Code is set to non-zero without changing the Reset Code, this known value can be used to reset the User PIN. To set the retry counters, the Admin PIN is required.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Yubikey 5 Nfc Firmware· Yubico
95%
5.2.0 ≤ v ≤ 5.2.6
yubico-yubikey-5-nfc (same device)
Yubikey 5 Nfc· Yubicodevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMMitigationVendor Advisory
Source: [email protected]
https://www.yubico.com/support/security-advisories/ysa-2020-05/

CVSS

5.9MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-Other

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