# CVE-2026-18269: Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability

> A physically present attacker can execute arbitrary code with root privileges on Kenwood DNR1007XR devices via an out-of-bounds write in the tchdr_bytestream_read function.

- **Severity:** Medium 6.8 (`CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 26 Aug 2026
- **Also known as:** GHSA-wg99-wchc-fc9x

## What is CVE-2026-18269?

CVE-2026-18269 is a medium-severity memory corruption vulnerability in Kenwood DNR1007XR, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Kenwood DNR1007XR tchdr_bytestream_read Out-Of-Bounds Write Code Execution Vulnerability. This vulnerability allows physically present attackers to execute arbitrary code on affected installations of Kenwood DNR1007XR devices. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the tchdr_bytestream_read function. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-28980.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2026-18269?


## How do I fix CVE-2026-18269?

No fix has been published for CVE-2026-18269 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18269 being exploited?

There is no known exploitation of CVE-2026-18269 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18269 and fix it if it is affected.

What it is: CVE-2026-18269 is a medium-severity memory corruption vulnerability in Kenwood DNR1007XR, published on 20 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-18269 in the wild and no public exploit code.

Affected product: Kenwood DNR1007XR. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-18269/ (Markdown: https://insights.sbomify.com/CVE-2026-18269/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18269
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18269
- OSV: https://osv.dev/vulnerability/CVE-2026-18269

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18269/
Summaries are generated and may contain mistakes; the official description above is the record.