#VU111145 Improper Authentication in XAV-AX8500 - CVE-2025-5820

Vulnerability identifier: #VU111145

Vulnerability risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-5820

CWE-ID: CWE-287

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
XAV-AX8500
Hardware solutions / Other hardware appliances

Vendor: Sony Corporation

Description

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to improper channel data initialization within the implementation of Bluetooth ERTM channel communication. A remote attacker on the local network can bypass authentication process and gain unauthorized access to the application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

XAV-AX8500: before 3.02.00

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External links
https://www.zerodayinitiative.com/advisories/ZDI-25-358/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.