# CVE-2026-47152: Silicon Labs EmberZNet divide-by-zero in Level Control cluster

Source: https://junglewise.ai/threats/cve-2026-47152-silicon-labs-emberznet-divide-by-zero-in-level-control-cluster  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-25. Updated: 2026-06-25  
License: CC BY 4.0 with a link back

CVE-2026-47152 · Severity: info · CVSS 7.1 · Published 2026-06-25

Silicon Labs EmberZNet, a software suite used to develop Zigbee-based smart home and industrial IoT devices, is vulnerable to a flaw that can cause devices to crash. An attacker with a device already connected to the network can send a specifically crafted command that forces the target device to restart or stop functioning. This results in a loss of service for the affected smart devices until they are recovered.

Technologies: [Silicon Labs EmberZNet](https://junglewise.ai/threats/technologies/emberznet). Vendors: [Silicon Labs](https://junglewise.ai/threats/vendors/silicon-labs).

## Quick answers

**Is CVE-2026-47152 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47152 being exploited in the wild.

**How severe is CVE-2026-47152?** Informational severity, with a CVSS score of 7.1, published 25 June 2026.

**Which products and versions are affected?** Silicon Labs EmberZNet v9.0.2 and earlier.

**Is there a fix for CVE-2026-47152?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-47152 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47152?** Check whether you run Silicon Labs EmberZNet at an affected version. 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

A divide-by-zero vulnerability (CWE-369) exists in Silicon Labs EmberZNet versions v9.0.2 and earlier within the handling of Zigbee Level Control cluster commands. Specifically, a malformed 'Level Control Move' command can trigger a process termination due to a mathematical error during processing. An attacker must already have a device joined to the Zigbee network (PR:L) to issue the command. The impact is limited to a denial-of-service (DoS) of the affected process on devices supporting the Level Control cluster. Users are advised to monitor Silicon Labs releases for patches following v9.0.2.

## Affected products

- Silicon Labs EmberZNet v9.0.2 and earlier

## Timeline

- 2026-06-25: disclosed
- 2026-06-25: advisory

## References

- [https://github.com/SiliconLabsSoftware/sisdk-release/](https://github.com/SiliconLabsSoftware/sisdk-release/)
- [https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1](https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm00000pEGPQIA4?operationContext=S1)

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- [Silicon Labs EmberZNet out-of-bounds write in Group Cluster](https://junglewise.ai/threats/cve-2026-85080-in-emberznet-9-1-1-and-earlier-a-malformed-getgroupmembership)
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