CVE-2025-5820: Sony XAV-AX8500 Bluetooth ERTM Channel Authentication Bypass Vulnerability

Q: How do I fix CVE-2025-5820?

xav-ax8500 firmware: upgrade to 3.02.00. Exact commands for each OS are on this page.

Q: Is CVE-2025-5820 being exploited?

CVE-2025-5820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-5820 affect?

CVE-2025-5820 affects xav-ax8500 firmware. Severity is high (CVSS 8.8). Sony XAV-AX8500 Bluetooth ERTM Channel 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 vu

Routine

HIGH 8.8UPGRADE

CVE-2025-5820 is a high-severity flaw (CVSS 8.8) affecting xav-ax8500 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Sony XAV-AX8500 Bluetooth ERTM Channel 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 Bluetooth ERTM channel communication. The issue results from improper channel data initialization. An attacker can leverage this vulnerability

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Adjacent network
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 71%)
CISA exploited list	No
Weakness	CWE-288
Published	2025-06-21
Last modified	2026-06-17

Publisher (CNA): Zero Day Initiative · Vendor: sony

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-06-21 01:15 UTCPublished CVE record published
2026-06-17 09:48 UTCUpdated Record last modified

sony xav-ax8500 firmware UPGRADE

Affected: >= 2.00.1 and < 3.02.00

Fixed in: 3.02.00

Safe to downgrade to: a release before 2.00.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-5820?

xav-ax8500 firmware: upgrade to 3.02.00. Exact commands for each OS are on this page.

Is CVE-2025-5820 being exploited?

CVE-2025-5820 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-5820 affect?

CVE-2025-5820 affects xav-ax8500 firmware. Severity is high (CVSS 8.8). Sony XAV-AX8500 Bluetooth ERTM Channel 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 vu

How urgent is CVE-2025-5820?

Priority 38/100. High severity

Software pages

Bluetooth vulnerabilities

Related CVEs

CVE-2025-5479 HIGH 7.5 UPGRADE Sony XAV-AX8500 Bluetooth AVCTP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2025-5478 HIGH 8.8 UPGRADE Sony XAV-AX8500 Bluetooth SDP Protocol Integer Overflow Remote Code Execution Vulnerability
CVE-2025-5477 HIGH 7.5 UPGRADE Sony XAV-AX8500 Bluetooth L2CAP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability
CVE-2025-5476 HIGH 8.8 UPGRADE Sony XAV-AX8500 Bluetooth Improper Isolation Authentication Bypass Vulnerability
CVE-2025-5475 HIGH 7.5 UPGRADE Sony XAV-AX8500 Bluetooth Packet Handling Integer Overflow Remote Code Execution Vulnerability

References

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