---
id: "CVE-2026-66282"
kind: "vulnerability"
aliases: ["CVE-2026-66282"]
title: "EmberZNet: malformed billing command causes endless recursion and device hang"
severity: "medium"
cvss: 6.0
epss: 0.00226
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["embedded", "infrastructure", "iot", "silicon-labs", "zigbee"]
not_affected_if: ["no-zigbee-network", "not-price-cluster", "patched-emberznet"]
published_at: "2026-10-22T14:17:44+00:00"
first_seen_at: "2026-10-23T21:57:31+00:00"
updated_at: "2026-10-25T04:05:26+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66282", "first_seen_at": "2026-10-23T21:57:31+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-66282", "first_seen_at": "2026-10-24T07:15:51+00:00"}]
---

# EmberZNet: malformed billing command causes endless recursion and device hang

EmberZNet 9.1.1 and earlier, the Silicon Labs Zigbee stack, mishandle a malformed Publish Billing Period command, which triggers a recursive call that never ends. An attacker on a joined device can likely crash or hang the affected node.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the EmberZNet SDK version on the device firmware: `9.1.1` or earlier is affected
- Check whether the device supports the Zigbee Price Cluster: unknown if the sources do not list the exact device configuration

## Fix

- Update EmberZNet to a release later than `9.1.1`: unknown, the fixed version is not stated in the sources

## Timeline

- 2026-10-23T21:57:31+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-66282
- 2026-10-24T07:15:51+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-66282

## From the sources

In EmberZNet 9.1.1 and earlier, a malformed Publish Billing Period command can result in a recursive function call that will never reach its end condition. These messages must come from a device that has already joined the network. Only devices supporting the Price Cluster are impacted.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_