# CVE-2026-18273: Kenwood DNR1007XR USB incorrect default permissions privilege escalation

Source: https://junglewise.ai/threats/cve-2026-18273-kenwood-dnr1007xr-usb-incorrect-default-permissions-privilege  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-20. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-18273 · Severity: medium · CVSS 6.6 · Published 2026-08-20

The Kenwood DNR1007XR is an in-car navigation and multimedia receiver. A local privilege escalation vulnerability in USB filesystem mounting allows an attacker with low-level code execution to gain root access and run arbitrary commands. This could compromise the device's functionality, enable data theft from infotainment systems, or be combined with other exploits to gain deeper vehicle control.

Technologies: [Kenwood DNR1007XR](https://junglewise.ai/threats/technologies/dnr1007xr). Vendors: [Kenwood](https://junglewise.ai/threats/vendors/kenwood).

## Quick answers

**Is CVE-2026-18273 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-18273 being exploited in the wild.

**How severe is CVE-2026-18273?** Medium severity, with a CVSS score of 6.6, published 20 August 2026.

**Which products and versions are affected?** Kenwood DNR1007XR.

**Is there a fix for CVE-2026-18273?** A patch was published on 2026-07-21: Firmware update released (version 2.0.0003) Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-18273 attacked?** It is attacked with physical access or with local access.

**Am I affected by CVE-2026-18273?** Check whether you run Kenwood DNR1007XR. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a local privilege escalation caused by incorrect permissions on a USB filesystem mount point directory in the DNR1007XR. An attacker must first achieve low-privileged code execution on the target system. The flaw allows the attacker to escalate privileges to root and execute arbitrary code with root-level permissions. The attack requires physical presence or prior compromise of the device. A patch has been issued by Kenwood in firmware version 2.0.0003 and later (released July 21, 2026).

## Affected products

- Kenwood DNR1007XR

## Timeline

- 2026-02-03: disclosed: Vulnerability reported to vendor
- 2026-07-21: patched: Firmware update released (version 2.0.0003)
- 2026-07-29: advisory: Coordinated public disclosure via ZDI

## References

- [https://www.kenwood.com/cs/ce/mm/firmware/2020/2020f/eng.html](https://www.kenwood.com/cs/ce/mm/firmware/2020/2020f/eng.html)
- [https://www.zerodayinitiative.com/advisories/ZDI-26-490/](https://www.zerodayinitiative.com/advisories/ZDI-26-490/)

## Related threats

- [Kenwood DNR1007XR command injection in startUpdateProcess](https://junglewise.ai/threats/cve-2026-18272-kenwood-dnr1007xr-command-injection-in-startupdateprocess)
- [Kenwood DNR1007XR vCardParser heap buffer overflow](https://junglewise.ai/threats/cve-2026-18271-kenwood-dnr1007xr-vcardparser-heap-buffer-overflow)
- [Kenwood DNR1007XR udhcpd privilege escalation via incorrect permissions](https://junglewise.ai/threats/cve-2026-18270-kenwood-dnr1007xr-udhcpd-privilege-escalation-via-incorrect)
- [Kenwood DNR1007XR out-of-bounds write in tchdr_bytestream_read](https://junglewise.ai/threats/cve-2026-18269-kenwood-dnr1007xr-out-of-bounds-write-in-tchdr-bytestream-read)
- [Kenwood DNR1007XR JKGenService command injection local privilege escalation](https://junglewise.ai/threats/cve-2026-18268-kenwood-dnr1007xr-jkgenservice-command-injection-local-privilege)