Harman Becker MGU21 Bluetooth denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic was found in Harman Becker MGU21. This issue affects some unknown processing of the component Bluetooth. Such manipulation leads to denial of service. This vulnerability is listed as CVE-2025-3885. The attack must be carried out from within the local network. There is no available exploit.

Detailsinfo

A vulnerability was found in Harman Becker MGU21 (version unknown) and classified as problematic. Affected by this issue is an unknown function of the component Bluetooth. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. CVE summarizes:

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.

The advisory is shared for download at zerodayinitiative.com. This vulnerability is handled as CVE-2025-3885 since 04/22/2025. The exploitation is known to be difficult. The attack needs to approached within the local network. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-16095). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 5.3
CNA Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/22/2025 🔍
04/24/2025 +2 days 🔍
04/24/2025 +0 days 🔍
08/15/2025 +113 days 🔍

Sourcesinfo

Advisory: zerodayinitiative.com
Status: Not defined

CVE: CVE-2025-3885 (🔍)
GCVE (CVE): GCVE-0-2025-3885
GCVE (VulDB): GCVE-100-306068
EUVD: 🔍

Entryinfo

Created: 04/24/2025 10:55
Updated: 08/15/2025 18:59
Changes: 04/24/2025 10:55 (50), 05/22/2025 07:08 (1), 05/24/2025 04:48 (11), 08/15/2025 18:59 (11)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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