CVE-2025-7964 PUBLISHED

Zigbee Router Denial of Service

Assigner: Silabs
Reserved: 21.07.2025 Published: 30.01.2026 Updated: 30.01.2026

After receiving a

malformed 802.15.4 MAC Data Request

the Zigbee Coordinator sends a ‘network leave’ request to Zigbee router resulting in the Zigbee Router getting stuck in a non-rejoinable state. If a suitable parent is not available, the end devices will be unable to rejoin. A manual recommissioning is required to recover the Zigbee Router.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H
CVSS Score: 9.2

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	None
User Interaction	None

CVSS 4.0

Product Status

Vendor	silabs.com
Product	Silicon Labs Zigbee Stack
Versions	Default: unaffected affected from 0 to 4.4.6 (incl.)

Vendor	silabs.com
Product	Silicon Labs Zigbee Stack
Versions	Default: unaffected affected from 0 to 2025.6.1 (incl.)

References

https://community.silabs.com/068Vm00000dspiL

Problem Types

CWE-229: Improper Handling of Values CWE

Impacts

CAPEC-153 Input Data Manipulation