CVE-2026-4526 Global ZCL command parser missing minimum-length validation in EmberZNet v9.0.2
A remote attacker with network access can cause a denial of service in Silicon Labs EmberZNet devices by sending malformed ZCL messages.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-4526?
CVE-2026-4526 is a high-severity denial of service vulnerability in Silicon Labs EmberZNet, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
In EmberZNet v9.0.2 and earlier, malformed global ZCL messages can trigger out-of-bounds reads in framework parsing logic and terminate the process. These messages must come from a device that has already joined the network, and no information leakage back to the sender was observed.
Weakness: CWE-125
Which versions are affected by CVE-2026-4526?
It affects 1 product.
Products include Silabs Emberznet.
How do I fix CVE-2026-4526?
No fix has been published for CVE-2026-4526 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-4526 being exploited?
There is no known exploitation of CVE-2026-4526 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-2026-47145 Color Control hue/saturation assertion abort in EmberZNet v9.0.2
- CVE-2026-47146 Color Control color-temperature assertion abort in EmberZNet v9.0.2
Sources
Also known as GHSA-xq6v-3fpg-crf4.