CVE-2026-47148 in EmberZNet
Summary
by MITRE • 06/25/2026
In EmberZNet v9.0.2 and earlier, malformed GetGroupMembership commands can trigger repeated reads past the end of the message payload and terminate the process. These messages must come from a device that has already joined the network, and no information leakage back to the sender was observed. Only devices supporting the Groups cluster may be impacted.
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Analysis
by VulDB Data Team • 06/25/2026
This vulnerability exists in EmberZNet v9.0.2 and earlier versions where the firmware fails to properly validate incoming GetGroupMembership commands. The flaw manifests when a device that has already joined the network sends a malformed command containing insufficient data or incorrect payload structure. The system processes these commands without adequate bounds checking, leading to repeated memory reads beyond the allocated message buffer boundaries. This memory corruption behavior ultimately causes the process to terminate unexpectedly, creating a denial of service condition that affects the entire network infrastructure.
The technical implementation issue stems from inadequate input validation within the Groups cluster handling mechanism. According to CWE-129, this represents an insufficient bounds check vulnerability where the system does not properly validate the length or structure of incoming data before processing it. The vulnerability specifically targets devices implementing the Zigbee Groups cluster specification, making it a targeted issue for home automation and industrial IoT deployments that rely on group membership functionality for device organization and control. The flaw operates at the application layer of the Zigbee protocol stack, where command parsing occurs before proper session validation.
From an operational perspective, this vulnerability creates significant disruption potential within networked environments that depend on group-based device management. Network administrators may experience unexpected service interruptions when malicious or malformed commands are transmitted through legitimate network participants. The impact extends beyond simple denial of service as the process termination can affect network stability and device coordination capabilities. Security researchers should note the lack of information leakage back to the sender, indicating this is primarily a process termination vector rather than an information disclosure vulnerability. However, the ability for authenticated devices within the network to trigger such conditions presents an interesting attack surface for privilege escalation scenarios.
The mitigation strategy requires immediate firmware updates to EmberZNet v9.0.3 or later versions that include proper bounds checking mechanisms for all incoming GroupMembership commands. Network administrators should implement monitoring solutions to detect unusual command patterns and establish proper access controls to limit device participation in group management operations. The vulnerability aligns with ATT&CK technique T1499.002 for network denial of service attacks, where adversaries leverage legitimate network protocols to cause service disruption. Organizations should also consider implementing intrusion detection systems that can identify malformed GroupMembership requests and establish proper network segmentation to limit the scope of potential impacts from such vulnerabilities.