CVE-2025-8639

Root code execution via firmware update string

Published Aug 6, 2025 · Updated Aug 6, 2025

OS command injection in Kenwood DMX958XR firmware 1.0.0005.4600 allows physically proximate attackers to execute code as root. The firmware update process uses an inadequately validated user-supplied string in a system call, allowing the string to alter the executed command. Physical access to initiate an unauthenticated firmware update is required, and successful exploitation grants root-level control of the receiver.

CVSS severity6.8
Medium
EPSS probability0.93%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

OS command injection in Kenwood DMX958XR firmware 1.0.0005.4600 allows physically proximate attackers to execute code as root. The firmware update process uses an inadequately validated user-supplied string in a system call, allowing the string to alter the executed command. Physical access to initiate an unauthenticated firmware update is required, and successful exploitation grants root-level control of the receiver.

The record

CVE
CVE-2025-8639
Published
Aug 6, 2025
Updated
Aug 6, 2025
Vendor
JVCKENWOOD
Product
DMX958XR
Classifications
CWE-78, T1200
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 6, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 6, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0005.4600 (SOC Image)

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

JVCKENWOOD · DMX958XRversion=1.0.0005.4600 (SOC Image)

Published CVSS scores

6.8Zero Day InitiativeCVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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