Zigbee Router Vulnerability in Silicon Labs Product Line
CVE-2025-7964

9.2CRITICAL

Key Information:

Vendor

Silabs.com

Status
Silicon Labs Zigbee Stack
Vendor
CVE Published:
30 January 2026

What is CVE-2025-7964?

A vulnerability exists within Silicon Labs' Zigbee Router that is triggered by malformed 802.15.4 MAC Data Requests. Upon receiving such a request, the Zigbee Coordinator incorrectly sends a ‘network leave’ command to the Zigbee Router. This flaw causes the router to enter a non-rejoinable state, preventing connected end devices from rejoining the network if no suitable parent device is available. Recovery from this state necessitates manual recommissioning of the Zigbee Router, which can disrupt network operations and affect connected IoT devices.

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Affected Version(s)

Silicon Labs Zigbee Stack 0 <= 4.4.6

Silicon Labs Zigbee Stack 0 <= 2025.6.1

References

https://community.silabs.com/068Vm00000dspiL
vendor-advisorypermissions-required

CVSS V4

Score:
9.2
Severity:
CRITICAL
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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