CVE-2026-47153
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn EmberZNet v9.0.2 and earlier, a malformed Level Control Step command can terminate the process through a divide-by-zero fault. This command must come from a device that has already joined the network. Only devices supporting the Level Control cluster may be impacted.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA divide-by-zero fault occurs in EmberZNet's Level Control cluster when processing a malformed Level Control Step command. The vulnerability is exploitable only by devices that have already joined the network, making it a network-adjacent attack requiring authentication. Successful exploitation causes the process to terminate, resulting in denial of service.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data<= 9.0.2CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify EmberZNet installationExamine the firmware or product documentation to confirm the device runs Silicon Labs EmberZNet stack. Check firmware strings or boot logs for 'EmberZNet' or 'EZSP' identifiers.Affected if EmberZNet is not present on the device
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Check EmberZNet versionRetrieve the installed EmberZNet version from firmware metadata, release notes, or by querying the stack version via diagnostic commands. Compare against the affected range.Affected if Version is 9.0.2 or lower
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Verify Level Control cluster implementationInspect the device's Zigbee cluster configuration or ZCL cluster map to determine if the Level Control cluster (cluster ID 0x0008) is implemented and enabled in the firmware.Affected if Level Control cluster is present and active
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Assess network join exposureReview network configuration settings to determine if device join is enabled or if unauthenticated devices can request joining. Check join permissions and trust center settings.Affected if Devices can join the network without strong authentication controls
A device is affected if it runs EmberZNet version 9.0.2 or lower, has the Level Control cluster implemented, and is accessible to authenticated network peers that can send malformed commands.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpdate EmberZNet to the latest version containing the patch. Network segmentation and strict join controls can limit exposure until patches are applied. Only devices implementing the Level Control cluster are affected.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-47153 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-47153 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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