CVE-2025-1221

DoS in Zigbee device due to heavy traffic

Description

A Zigbee Radio Co-Processor (RCP), which is using SiLabs EmberZNet Zigbee stack, was unable to send messages to the host system (CPCd) due to heavy Zigbee traffic, resulting in a Denial of Service (DoS) attack, Only hard reset will bring the device to normal operation

Category

5.9
CVSS
Severity: Medium
CVSS 4.0 •
EPSS 0.02%
Vendor Advisory silabs.com
Affected: silabs.com Zigbee
Affected: silabs.com Zigbee
Published at:
Updated at:

References

Link Tags
https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf release notes
https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf release notes
https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf release notes
https://community.silabs.com/068Vm00000Sadyn vendor advisory permissions required

Frequently Asked Questions

What is the severity of CVE-2025-1221?
CVE-2025-1221 has been scored as a medium severity vulnerability.
How to fix CVE-2025-1221?
To fix CVE-2025-1221, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-1221 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-1221 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-1221?
CVE-2025-1221 affects silabs.com Zigbee, silabs.com Zigbee.
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