CVE-2025-1221 MEDIUM

CVE-2025-1221: DoS in Zigbee device due to heavy traffic

Vendor Silabs.com
Product Zigbee
Weakness CWE-667
Published July 30, 2025
Last update July 30, 2025
View on NVD All CVEs

CVSS base score

5.9/10
Attack vector Adjacent
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

July 30, 2025 CVE published
July 30, 2025 Record updated