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CVE-2025-5476: Sony XAV-AX8500 Bluetooth Improper Isolation Authentication Bypass Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-21 · updated 2026-06-17
• Weakness: CWE-653

Description

Sony XAV-AX8500 Bluetooth Improper Isolation Authentication Bypass Vulnerability. This vulnerability allows network-adjacent attackers to bypass authentication on affected Sony XAV-AX8500 devices. Authentication is not required to exploit this vulnerability. The specific flaw exists within the implementation of ACL-U links. The issue results from the lack of L2CAP channel isolation. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-26284.

Affected products

• Sony XAV-AX8500: from 2.00.01 before 3.02.00 — fixed in 3.02.00

How to fix

Upgrade to a fixed version: Sony XAV-AX8500 3.02.00. Check the vendor advisory for mitigations.

References

• https://www.sony.com/electronics/support/mobile-cd-players-digital-media-players-xav-series/xav-ax8500/software/00344092
• https://www.zerodayinitiative.com/advisories/ZDI-25-357/

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