CVE-2025-3885 — Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Harman Becker / MGU21	affected MGU21_22-07 firmware with BCM89359 wireless chipset; LMP Version: 5.0 (0x9); LMP Subversion: 0x420d

CWE

CWE-20

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.