Vulnerability · Published Jan 30, 2026 · Assigned by Silabs

CVE-2025-7964Zigbee Router Denial of Service

Critical 9.2

In plain English

A critical-severity security flaw in Silicon Labs Zigbee Stack 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 0.3% (higher than 23% of all known vulnerabilities).

Severity (CVSS 4.0)9.2Critical

Exploit odds (30 days)0.3%top 77.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
silabs.com	Silicon Labs Zigbee Stack	0 – through 4.4.6
silabs.com	Silicon Labs Zigbee Stack	0 – through 2025.6.1

Weakness: CWE-229 · 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

References

https://community.silabs.com/068Vm00000dspiL vendor-advisory, permissions-required