# CVE-2026-47151: Silicon Labs EmberZNet out-of-bounds write in Door Lock cluster

Source: https://junglewise.ai/threats/cve-2026-47151-silicon-labs-emberznet-out-of-bounds-write-in-door-lock-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-2026-47151 · Severity: info · CVSS 7.1 · Published 2026-06-25

Silicon Labs EmberZNet, a software stack used for Zigbee networking in smart home and industrial devices, contains a vulnerability in its door lock management component. An attacker with access to the local Zigbee network can send specially crafted messages to crash or disrupt the scheduling functionality of electronic door locks. This could lead to a denial of service where lock schedules cannot be properly managed or updated.

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

## Quick answers

**Is CVE-2026-47151 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-47151 being exploited in the wild.

**How severe is CVE-2026-47151?** 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-2026-47151?** 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-2026-47151 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-47151?** 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

An out-of-bounds write vulnerability (CWE-787) exists in Silicon Labs EmberZNet v9.0.2 and earlier within the Door Lock cluster. The flaw is triggered by malformed ClearWeekdaySchedule messages, which cause the stack to write data outside of the intended Door Lock schedule state buffer. While the size and location of the write are limited, it can lead to memory corruption or a denial of service (system crash). Exploitation requires the attacker to be on a device that has already successfully joined the Zigbee network (PR:L). Only devices implementing the Door Lock cluster are affected.

## 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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