CVE-2026-47152 in EmberZNet
Summary
by MITRE • 06/25/2026
In EmberZNet v9.0.2 and earlier, a malformed Level Control Move command can terminate the process through a divide-by-zero fault. This command must come from a device that has already joined the network. Only devices supporting the Level Control cluster may be impacted.
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Analysis
by VulDB Data Team • 06/26/2026
This vulnerability resides within EmberZNet protocol stack version 9.0.2 and earlier implementations where a specific malformed Level Control Move command can trigger a critical divide-by-zero fault leading to process termination. The flaw specifically affects devices that have successfully joined the network and possess Level Control cluster support, making it a targeted issue within Zigbee smart home and industrial automation ecosystems. The vulnerability demonstrates a classic software error pattern where improper input validation leads to arithmetic exceptions that crash the underlying process without proper exception handling mechanisms.
The technical execution of this vulnerability requires an attacker to first establish a network presence through legitimate device joining procedures, then send a specially crafted Level Control Move command that contains invalid parameters causing division operations to attempt division by zero. This type of fault represents a fundamental programming error classified under CWE-369 as Divide by Zero and falls within the broader category of improper input validation issues. The attack vector requires network access and device authentication capabilities, making it a medium-risk vulnerability that can be exploited in environments where network security controls are insufficient.
Operational impact of this vulnerability extends beyond simple process termination to potentially disrupt smart home automation systems, industrial monitoring networks, or building management systems that rely on EmberZNet stack implementations. When the target device crashes due to divide-by-zero condition, it may require manual intervention for recovery, leading to service degradation or complete system outages in critical infrastructure deployments. The vulnerability affects devices implementing the Zigbee Level Control cluster specification which is commonly found in lighting control systems, motorized blinds, and various smart home appliances where continuous operation is essential for user experience and safety.
Mitigation strategies should focus on implementing robust input validation mechanisms for all Level Control cluster commands, including proper boundary checking and parameter validation before arithmetic operations. Network administrators should upgrade to EmberZNet versions beyond 9.0.2 where this divide-by-zero condition has been addressed through improved error handling and input sanitization. Additionally, implementing network segmentation and access controls can limit potential attack surfaces while maintaining monitoring capabilities for detecting anomalous command sequences. The vulnerability aligns with ATT&CK technique T1059.007 for Command and Scripting Interpreter and demonstrates the importance of defensive programming practices in embedded systems security as outlined in NIST SP 800-160 standards for secure software development lifecycle implementation.