CVE-2026-4526

Process termination via truncated global ZCL messages

Published Jun 25, 2026 · Updated Jun 25, 2026

Out-of-bounds reads in Silicon Labs EmberZNet 9.0.2 and earlier allow attackers to terminate the process via malformed global ZCL messages. The framework global-command parser reads truncated message fields without enforcing the command's minimum payload length. A sending device must already have joined the Zigbee network; the observed result is process termination, with no data returned to the sender.

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

Out-of-bounds reads in Silicon Labs EmberZNet 9.0.2 and earlier allow attackers to terminate the process via malformed global ZCL messages. The framework global-command parser reads truncated message fields without enforcing the command's minimum payload length. A sending device must already have joined the Zigbee network; the observed result is process termination, with no data returned to the sender.

The record

CVE
CVE-2026-4526
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Sigma Designs
Product
Zigbee EmberZNet
Classifications
CWE-125, CAPEC-153, T1499
Attack vector
adjacent
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 vectoradjacent
Required privilegesauthenticated

What is affected?

Sigma Designs · Zigbee 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
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CAPEC-153Input Data Manipulation
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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