9.2Critical

CVE-2025-7964Zigbee Router Denial of Service

silabs.com Silicon Labs Zigbee Stack Published: 2026-01-30 18:02 (9 months ago)

Description

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.

Weakness (CWE): CWE-229

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
silabs.com	Silicon Labs Zigbee Stack	≤ 4.4.6

References and patches

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

CVSS score

9.2Critical

Source: Silabs · CVSS 4.0

Attack vector: Network
Attack complexity: Low
Attack requirements: None
Privileges required: None
User interaction: None
Confidentiality: None
Integrity: None
Availability: High

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

All scores (2)

cna	CVSS 4.0	9.2Critical
product-security@silabs.com	CVSS 4.0	9.2Critical

EPSS (chance of exploitation in 30 days)

0.30%

higher than 23% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: yes
Technical impact: partial

Timeline

ID reserved2025-07-21
Published2026-01-30 18:02
Reached IP-DB2026-10-25 00:02
Last updated2026-06-17 13:06

Assigned by (CNA): Silabs
NVD status: Deferred

View at source: CVE.org · NVD

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