CVE-2026-47153Network attack vector

Process crash via malformed Level Control Step command

Published Jun 25, 2026 · Updated Jun 25, 2026

Divide-by-zero in Silicon Labs EmberZNet 9.0.2 and earlier allows remote authenticated users to crash the process via a malformed Step command. Silicon Labs identifies the Level Control Step With On/Off command handler but has not published the arithmetic operation or unchecked command field. Exploitation requires a device that has joined the Zigbee network and a target implementing the Level Control cluster; the reported consequence is process termination.

CVSS severity7.1
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in Silicon Labs EmberZNet 9.0.2 and earlier allows remote authenticated users to crash the process via a malformed Step command. Silicon Labs identifies the Level Control Step With On/Off command handler but has not published the arithmetic operation or unchecked command field. Exploitation requires a device that has joined the Zigbee network and a target implementing the Level Control cluster; the reported consequence is process termination.

The record

CVE
CVE-2026-47153
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Sigma Designs
Product
EmberZNet
Classifications
CWE-369, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=9.0.2

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sigma Designs · EmberZNetversion=0 <=9.0.2

Published CVSS scores

7.1Silicon LabsCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-369Divide By Zero
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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