CVE-2026-47147Network attack vector

Limited RAM disclosure via unchecked OTA fields

Published Jun 25, 2026 · Updated Jun 25, 2026

Out-of-bounds reads in Silicon Labs Zigbee EmberZNet 9.0.2 and earlier allow remote attackers to read limited RAM via malformed OTA requests. The OTA server raw parser fails to validate individual field bounds before parsing, so crafted lengths drive reads beyond request data and return a constrained memory fragment. Reachability requires a device already joined to the Zigbee network and target firmware supporting the OTA Server cluster; the disclosed consequence is limited RAM disclosure.

CVSS severity7.1
High
EPSS probability0.40%
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 Zigbee EmberZNet 9.0.2 and earlier allow remote attackers to read limited RAM via malformed OTA requests. The OTA server raw parser fails to validate individual field bounds before parsing, so crafted lengths drive reads beyond request data and return a constrained memory fragment. Reachability requires a device already joined to the Zigbee network and target firmware supporting the OTA Server cluster; the disclosed consequence is limited RAM disclosure.

The record

CVE
CVE-2026-47147
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
Sigma Designs
Product
Zigbee EmberZNet
Classifications
CWE-125, CAPEC-153
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 · Zigbee EmberZNetversion=0 <=9.0.2

Published CVSS scores

7.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
7.1Silicon LabsCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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