How severe is CVE-2025-5820?

CVE-2025-5820 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-5820 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-5820?

CVE-2025-5820 affects Sony Xav-ax8500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-5820?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-5820 have an EU (EUVD) identifier?

Yes. CVE-2025-5820 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18880.

When was CVE-2025-5820 published?

CVE-2025-5820 was published on 2025-06-21 and last updated on 2026-06-17.

CVE-2025-5820

CVE-2025-5820 is a high-severity vulnerability in Sony Xav-ax8500 Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-288.

Key facts

Severity: High (CVSS 3.x base score 8.8)
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18880
Weakness: CWE-288
Affected product: Sony Xav-ax8500 Firmware
Published: 2025-06-21
Last modified: 2026-06-17

Description

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 to bypass authentication on the system. Was ZDI-CAN-26285.

Frequently asked questions

What is CVE-2025-5820?: 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 to bypass authentication on the system. Was ZDI-CAN-26285.
How severe is CVE-2025-5820?: CVE-2025-5820 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-5820 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-5820?: CVE-2025-5820 affects Sony Xav-ax8500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-5820?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-5820 have an EU (EUVD) identifier?: Yes. CVE-2025-5820 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18880.
When was CVE-2025-5820 published?: CVE-2025-5820 was published on 2025-06-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:sony:xav-ax8500_firmware:*:*:*:*:*:*:*:*

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