CVE-2026-66281 Authenticated Denial-of-Service in Zigbee Discover Attributes Handling
Medium 6.0
Published
Updated
Check this codebase for CVE-2026-66281 and fix it if it is affected.
What it is: CVE-2026-66281 is a medium-severity vulnerability in Silicon Labs EmberZNet, published on 22 Oct 2026.
Exploitation: There is no known exploitation of CVE-2026-66281 in the wild and no public exploit code.
Affected product: Silicon Labs EmberZNet. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-66281/ (Markdown: https://insights.sbomify.com/CVE-2026-66281/index.md)
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-66281?
CVE-2026-66281 is a medium-severity vulnerability in Silicon Labs EmberZNet, published on 22 Oct 2026.
Official description
In EmberZNet 9.1.1 and earlier, a malformed Discover Attributes command can result in a loop with unreachable exit condition (infinite loop). These messages must come from a device that has already joined the network. Only devices supporting manufacturer-specific clusters are impacted.
Weakness: CWE-835
Which versions are affected by CVE-2026-66281?
It affects 1 product.
Products include Silabs Emberznet.
How do I fix CVE-2026-66281?
No fix has been published for CVE-2026-66281 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-66281 being exploited?
There is no known exploitation of CVE-2026-66281 in the wild and no public exploit code.
Other vulnerabilities in Silicon Labs EmberZNet
- CVE-2023-41094 Touchlink authentication bypass due to packets processed after timeout or out of range in Ember ZNet
- CVE-2026-85079 Out-of-bounds write in Zigbee Simple_Desc_req handling
- CVE-2026-94502 Out-of-bounds write in Zigbee Publish Price Matrix handling
- CVE-2026-4526 Global ZCL command parser missing minimum-length validation in EmberZNet v9.0.2
- CVE-2026-47145 Color Control hue/saturation assertion abort in EmberZNet v9.0.2
Sources
Also known as GHSA-66pg-69wm-9qqf.