CVE-2025-3885 — MEDIUM (6.5)

Vulnerability Description

Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition on affected installations of Harman Becker MGU21 devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the Bluetooth stack of the BCM89359 chipset. The issue results from the lack of proper validation of Bluetooth frames. An attacker can leverage this vulnerability to create a denial-of-service condition on the system. Was ZDI-CAN-23942.

CVSS Score

6.5

MEDIUM

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

ADJACENT_NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
Samsung	Harman Mgu21 Firmware	mgu21_22-07
Samsung	Harman Mgu21	-

Related Weaknesses (CWE)

CWE-20

References

https://www.zerodayinitiative.com/advisories/ZDI-25-251/Third Party Advisory

FAQ

What is CVE-2025-3885?

CVE-2025-3885 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability. This vulnerability allows network-adjacent attackers to create a denial-of-service condition on affected instal...

How severe is CVE-2025-3885?

CVE-2025-3885 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2025-3885?

Check the references section above for vendor advisories and patch information. Affected products include: Samsung Harman Mgu21 Firmware, Samsung Harman Mgu21.