CVE-2025-1221

DoS in Zigbee device due to heavy traffic

CVSS 5.9 MEDIUMEPSS 0.2%CWE-667

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

30 Jul 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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

CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected products

silabs.com · Zigbee

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References

https://community.silabs.com/068Vm00000Sadyn https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-7.4.4.0.pdf https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.0.2.0.pdf https://www.silabs.com/documents/public/release-notes/emberznet-release-notes-8.1.0.0.pdf