CVE-2025-3885 Harman Becker MGU21 Bluetooth Improper Input Validation Denial-of-Service Vulnerability
Network-adjacent attackers can cause a denial-of-service condition on Harman Becker MGU21 devices via improper Bluetooth frame validation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-3885?
CVE-2025-3885 is a medium-severity denial of service vulnerability in Harman Becker MGU21, published on 22 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2025-3885?
It affects 1 product.
Products include Samsung Harman Mgu21 Firmware.
How do I fix CVE-2025-3885?
No fix has been published for CVE-2025-3885 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-3885 being exploited?
There is no known exploitation of CVE-2025-3885 in the wild and no public exploit code.
Sources
Also known as GHSA-c686-8f3m-h49h.