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Medium · 5.9 CVE-2025-1221 EUVD-2025-23150GHSA-542q-g93g-wjg9

DoS in Zigbee device due to heavy traffic

Published Jul 30, 2025 · Updated Jul 30, 2025 · Assigned by Silabs

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

Affected products

VendorProductAffectedFixed
silabs.com Zigbee ≤ 4.3.3, 4.4.3, ≤ 2024.6.1 —

References