Vulnerability · Published Jul 30, 2025 · Assigned by Silabs
CVE-2025-1221DoS in Zigbee device due to heavy traffic
Medium 5.9
In plain English
A medium-severity security flaw in Zigbee from silabs.com. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).
Severity (CVSS 4.0)5.9Medium
Exploit odds (30 days)0.2%top 88.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| silabs.com | Zigbee | 0 – through 4.3.34.4.3 |
| silabs.com | Zigbee | 0 – through 2024.6.1 |
Weakness: CWE-667 · 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
References
- 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