(Pwn2Own) Kenwood DNR1007XR USB Incorrect Default Permissions Local Privilege Escalation Vulnerability

July 29th, 2026
ZDI-26-490 ZDI-CAN-29070

CVE ID

CVE-2026-18273

CVSS Score

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

Affected Vendors

Kenwood

Affected Products

DNR1007XR

Vulnerability Details

This vulnerability allows physically present attackers to escalate privileges on affected installations of Kenwood DNR1007XR devices. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the configuration of the mount point for the USB filesystem. The issue results from incorrect permissions on a directory used by the product. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of root.

Additional Details

Kenwood has issued an update to correct this vulnerability. More details can be found at:
https://www.kenwood.com/cs/ce/mm/firmware/2020/2020f/eng.html

Disclosure Timeline

  • 2026-02-03 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

TienPP from FPT NightWolf Team

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