CVE-2025-1221— DoS in Zigbee device due to heavy traffic
Quick assessment
Affected
silabs.com Zigbee
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Silicon Labs Zigbee EmberZNet SDK是美国Silicon Labs公司的一个用于开发Zigbee网络的软件开发工具包 Silicon Labs Zigbee EmberZNet SDK存在安全漏洞，该漏洞源于高流量导致消息发送失败，可能导致拒绝服务攻击。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-1221
Vulnerability Information
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Vulnerability Title
DoS in Zigbee device due to heavy traffic
Source: CVE Program / CVE List V5
Vulnerability 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
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
加锁机制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Silicon Labs Zigbee EmberZNet SDK 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Silicon Labs Zigbee EmberZNet SDK是美国Silicon Labs公司的一个用于开发Zigbee网络的软件开发工具包 Silicon Labs Zigbee EmberZNet SDK存在安全漏洞，该漏洞源于高流量导致消息发送失败，可能导致拒绝服务攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| silabs.com | Zigbee | 0 ~ 4.3.3 | - |
|
| silabs.com | Zigbee | 0 ~ 2024.6.1 | - |
|
II. Public POCs for CVE-2025-1221
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: silabs.com
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CVE-2026-16769
RS9116W/SiWx917 plaintext pause encryption request causes DO -
CVE-2026-65936
RS9116W/SiWx917 malformed packet with increased length fiel -
CVE-2026-65935
Bypassing passkey entry in legacy pairing -
CVE-2026-65934
BT122 plaintext pause encryption request causes DOS -
CVE-2026-65933
BT122 malformed packet with increased length field causes m
Same weakness: CWE-667
V. Comments for CVE-2025-1221
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