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TI-2025-03432 Aliases CVE-2025-3885GHSA-c686-8f3m-h49h

Improper input validation in Harman Becker MGU21

Priority LOW 29CWE-20Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0029 21st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Harman BeckerMGU21MGU21_22-07 firmware with BCM89359 wireless chipset; LMP Version: 5.0 (0x9); LMP Subversion: 0x420d—No fix listedCNA
  • MGU21 VendorHarman Becker Affected MGU21_22-07 firmware with BCM89359 wireless chipset; LMP Version: 5.0 (0x9); LMP Subversion: 0x420d Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:samsung:harman_mgu21_firmware:mgu21_22-07:*:*:*:*:*:*:*mgu21_22-07VulnerableSamsung
cpe:2.3:h:samsung:harman_mgu21:-:*:*:*:*:*:*:*not specified by NVDRunning onSamsung
  • cpe:2.3:o:samsung:harman_mgu21_firmware:mgu21_22-07:*:*:*:*:*:*:* Versions mgu21_22-07 Vulnerable ·Samsung
  • cpe:2.3:h:samsung:harman_mgu21:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Samsung

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-3885
  2. 2026-10-03 Alias added: GHSA-c686-8f3m-h49h

References

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences