CleverDisplay BlueOne unauthorized BIOS access through physical USB keyboard

published 2025-12-12 10 mo ago modified 2026-10-07 32 d ago also EUVD-2025-203085

cvss: 2.4; version 4.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits: 0; none known

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.

Patch / fix

fixed in 1

CleverDisplay B.V. BlueOne (CleverDisplay Hardware Player) 12.12.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 10 mo ago (2025-12-12)

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	2.4	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
CNA	4.0	2.4	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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:N/AU:N/R:X/V:D/RE:L/U:Green

Affected products

CleverDisplay B.V. BlueOne (CleverDisplay Hardware Player)

Classification

Weakness

CWE-1244 Internal Asset Exposed to Unsafe Debug Access Level or State
CWE-1191 On-Chip Debug and Test Interface With Improper Access Control

References

csirt.divd.nl /CVE-2025-5743/
third-party-advisory
csirt.divd.nl /DIVD-2025-00043
third-party-advisory

Sources

CVE List CVE-2025-36755
NVD CVE-2025-36755

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary