# CVE-2026-47153: Level Control Step With On/Off divide-by-zero in EmberZNet v9.0.2

> A malformed Level Control Step command from a joined device causes a divide-by-zero crash in EmberZNet, impacting devices with the Level Control cluster.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 25 Jun 2026
- **Updated:** 25 Jun 2026
- **Also known as:** GHSA-qmrv-48wx-3c53

## What is CVE-2026-47153?

CVE-2026-47153 is a high-severity denial of service vulnerability in Silicon Labs EmberZNet, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

In EmberZNet v9.0.2 and earlier, a malformed Level Control Step command can terminate the process through a divide-by-zero fault. This command must come from a device that has already joined the network. Only devices supporting the Level Control cluster may be impacted.

Weakness: CWE-369 (Divide By Zero)

## Which versions are affected by CVE-2026-47153?

It affects 1 product.


Products: Silabs Emberznet.

## How do I fix CVE-2026-47153?

No fix has been published for CVE-2026-47153 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-47153 being exploited?

There is no known exploitation of CVE-2026-47153 in the wild and no public exploit code.

## Other vulnerabilities in Silicon Labs EmberZNet

- [CVE-2023-41094](https://insights.sbomify.com/CVE-2023-41094/): Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet (critical 10.0)
- [CVE-2026-85079](https://insights.sbomify.com/CVE-2026-85079/): Out-of-bounds write in Zigbee Simple_Desc_req handling (high 7.5)
- [CVE-2026-94502](https://insights.sbomify.com/CVE-2026-94502/): Out-of-bounds write in Zigbee Publish Price Matrix handling (high 7.5)
- [CVE-2026-4526](https://insights.sbomify.com/CVE-2026-4526/): Global ZCL command parser missing minimum-length validation in EmberZNet v9.0.2 (high 7.1)
- [CVE-2026-47145](https://insights.sbomify.com/CVE-2026-47145/): Color Control hue/saturation assertion abort in EmberZNet v9.0.2 (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-47153 and fix it if it is affected.

What it is: CVE-2026-47153 is a high-severity denial of service vulnerability in Silicon Labs EmberZNet, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-47153 in the wild and no public exploit code.

Affected product: Silicon Labs EmberZNet. 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-2026-47153/ (Markdown: https://insights.sbomify.com/CVE-2026-47153/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-47153
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-47153
- OSV: https://osv.dev/vulnerability/CVE-2026-47153

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-47153/
Summaries are generated and may contain mistakes; the official description above is the record.