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zigbee-stack

GSDK

SiSDK

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.

CVE-2025-7964 is a critical vulnerability identified in the Silicon Labs Zigbee Stack, specifically related to the handling of malformed 802.15.4 MAC Data Request frames by the Zigbee Coordinator. When the Coordinator receives such a malformed request, it erroneously issues a 'network leave' command to a Zigbee Router. This causes the Router to enter a non-rejoinable state, effectively removing it from the Zigbee mesh network. Since Zigbee networks rely on hierarchical parent-child relationships for device connectivity, if the Router cannot rejoin and no alternative parent is available, the end devices connected through that Router lose network connectivity and cannot rejoin automatically. This results in a denial of service condition affecting network availability. The vulnerability is classified under CWE-229 (Improper Handling of Values), indicating that the stack does not correctly validate or sanitize input values leading to this state corruption. The CVSS 4.0 base score of 9.2 reflects that the vulnerability is remotely exploitable over the network (AV:N), requires no privileges (PR:N), no user interaction (UI:N), and causes high impact on availability (VA:H). No authentication or user interaction is required, making exploitation straightforward for an attacker with network access to the Zigbee Coordinator. Although no known exploits have been reported in the wild, the potential for disruption in IoT and industrial environments using Silicon Labs Zigbee Stack is significant. The affected versions are not explicitly detailed beyond version '0', suggesting early or all versions of the stack may be impacted. No patches or fixes are currently linked, indicating that mitigation strategies must be applied at the network or operational level until vendor remediation is available.

Detailed information about CVE-2025-7964: CWE-229: Improper Handling of Values in silabs.com Silicon Labs Zigbee Stack affecting silabs.com Silicon Labs Zigbee 

CVE-2025-7964: CWE-229: Improper Handling of Values in silabs.com Silicon Labs Zigbee Stack - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2025-7964: CWE-229: Improper Handling of Values in silabs.com Silicon Labs Zigbee Stack

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