CVE-2026-47145 in EmberZNet
Summary
by MITRE • 06/25/2026
In EmberZNet v9.0.2 and earlier, malformed Color Control messages can lead to asserts that terminate the process. These messages must come from a device that has already joined the network. Only devices supporting the Color Control cluster may be impacted.
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Analysis
by VulDB Data Team • 06/25/2026
The vulnerability resides within EmberZNet software version 9.0.2 and earlier, where improper handling of Color Control cluster messages results in system assertion failures leading to process termination. This represents a denial of service condition that specifically targets devices implementing the Color Control cluster functionality within Zigbee networks. The flaw requires pre-existing network membership, meaning only devices that have successfully joined the network can be affected by this vulnerability. The technical nature of the issue stems from insufficient input validation mechanisms when processing malformed Color Control messages, which causes the system to trigger an assertion and subsequently crash the process.
From a cybersecurity perspective, this vulnerability aligns with CWE-248, which addresses "Uncaught Exception" conditions where programs fail to handle exceptional circumstances properly. The attack vector requires an adversary to be positioned within the same network segment as the vulnerable device, making it a network-based threat that does not require external access. The operational impact extends beyond simple service disruption since process termination can result in complete loss of color control functionality for affected devices, potentially compromising smart home automation systems or industrial lighting controls. Devices supporting the Color Control cluster become immediately vulnerable upon receiving malformed messages, creating a potential cascade effect if multiple devices are compromised within the same network.
The exploitation scenario involves an attacker sending specially crafted Color Control cluster messages to a device that has already joined the network and supports this particular cluster. This attack pattern corresponds to techniques described in the MITRE ATT&CK framework under T1499.004, specifically "Toggle System Execution Flag," where legitimate system processes are disrupted through malformed inputs. The vulnerability impacts the availability aspect of the CIA triad by preventing proper operation of color control functions, potentially affecting user experience in smart home environments or operational efficiency in industrial settings. Network segmentation and access controls become critical defensive measures since the attack requires network proximity rather than remote exploitation capabilities.
Mitigation strategies should focus on implementing robust input validation for all Color Control cluster messages, including proper bounds checking and error handling mechanisms that prevent assertion failures from occurring. Firmware updates addressing this specific vulnerability are essential, as they would include improved message parsing routines that gracefully handle malformed inputs without triggering system assertions. Network monitoring solutions should be deployed to detect anomalous Color Control cluster traffic patterns that might indicate attempted exploitation. Additionally, implementing proper logging and alerting mechanisms allows administrators to identify when malformed messages are being processed, enabling rapid response to potential attacks. Device manufacturers should also consider implementing rate limiting or message filtering capabilities within the network stack to prevent rapid succession of malformed messages from overwhelming vulnerable systems.