What is the CVSS score of CVE-2025-5479?

CVE-2025-5479 has a CVSS 3.0 base score of 7.5 (High). CVSS vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-5479?

Within 24 hours: Identify all Sony XAV-AX8500 devices in your environment and document their locations and criticality. Within 7 days: Apply the available vendor patch to all affected devices, prioritizing fleet vehicles and high-use systems. Within 30 days: Verify patch deployment across all systems, update device inventory records, and consider implementing Bluetooth pairing restrictions or monitoring where operationally feasible.

Xav Ax8500 Firmware CVE-2025-5479

EUVD-2025-18882 HIGH

Heap-based Buffer Overflow (CWE-122)

2025-06-21 zdi-disclosures@trendmicro.com

RCE Buffer Overflow Xav Ax8500 Firmware Sony

7.5

CVSS 3.0 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-122 OWASP Top 10:2025 A06:2021 - Vulnerable and Outdated Components ASVS 5.0 V15 - Secure Coding and Architecture Heap buffer bounds checking MITRE ATT&CK 1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 7.5. EPSS 0.1%. Vendor patch available.
Exploit ScenarioDerived	An attacker could exploit this vulnerability in the affected application to compromise the security of affected deployments, potentially impacting confidentiality, integrity, or availability.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

A remote code execution vulnerability (CVSS 7.5) that allows network-adjacent attackers. High severity vulnerability requiring prompt remediation. Vendor patch is available.

Earlier versions of this analysis (1)

v1 Mar 15, 2026 - 21:35 CVSS 7.5

RemediationAI

Apply the vendor-supplied patch immediately. Consider network segmentation to limit exposure if patching is delayed.

Affected VersionsENISA

XAV-AX8500 2.00.01

Affected Packages

euvd xav_ax8500 no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-122 (Heap-based Buffer Overflow). CVSS 7.5 indicates high severity.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch released

Mar 15, 2026 - 21:35 nvd

Patch available

CVE Published

Jun 21, 2025 - 01:15 nvd

HIGH 7.5

DescriptionCVE.org

Sony XAV-AX8500 Bluetooth AVCTP Protocol Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Sony XAV-AX8500 devices. An attacker must first obtain the ability to pair a malicious Bluetooth device with the target system in order to exploit this vulnerability.

The specific flaw exists within the implementation of the Bluetooth AVCTP protocol. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-26290.

Executive ViewAI

Why It Matters

Sony XAV-AX8500 in-vehicle infotainment systems are vulnerable to remote code execution if an attacker can pair a malicious Bluetooth device, potentially compromising vehicle safety systems and user data. While the exploit requires physical proximity to pair a device, successful exploitation could allow attackers to control critical vehicle functions. Organizations operating vehicle fleets or providing these devices should prioritize patching to eliminate this attack vector.

Business Impact: Medium

Compensating Controls

Apply vendor patch. If patching is delayed: (1) Disable Bluetooth pairing discovery or restrict to known devices only; (2) Physically secure devices to limit attacker access for pairing; (3) Monitor device logs for unusual Bluetooth pairing attempts; (4) Segment in-vehicle networks to isolate infotainment systems from critical vehicle control systems where possible.

Threat Intelligence Overview

EPSS Score

0.1%

Top 77% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Controlled

Automatable· derived

Human Impact

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.