CVE-2026-19747 in CH7
Summary
by MITRE • 08/13/2026
A weakness has been identified in Tenda CH7, CH7G, CH10, CP3, CP3 Pro, CP7, TC3B14C, TC3B15C, TC3T14C and TC3T15C up to 20260625. This impacts the function CAte::HandleCmd of the file Kylin of the component ATE Module. This manipulation causes command injection. The attack is possible to be carried out remotely.
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Analysis
by VulDB Data Team • 08/13/2026
This vulnerability affects multiple Tenda wireless router models including CH7, CH7G, CH10, CP3, CP3 Pro, CP7, TC3B14C, TC3B15C, TC3T14C and TC3T15C devices with firmware versions up to 20260625. The flaw resides in the CAte::HandleCmd function within the Kylin file of the ATE Module component, which processes commands without proper input validation or sanitization mechanisms. This weakness creates a command injection vulnerability that allows attackers to execute arbitrary commands on the affected devices.
The technical implementation of this vulnerability stems from insufficient input validation within the ATE Module's command handling functionality. When the system processes user-supplied data through the CAte::HandleCmd function, it fails to properly sanitize or escape command parameters before incorporating them into system execution contexts. This design flaw directly maps to CWE-77 which describes improper neutralization of special elements used in system commands. The vulnerability operates at the application layer where user-controllable inputs are improperly handled during command construction and execution phases.
Remote exploitation of this vulnerability enables attackers to gain unauthorized access to affected devices, potentially leading to complete system compromise. The attack surface extends across network protocols that communicate with the device's administration interfaces, allowing malicious actors to inject harmful commands from external networks. This remote capability significantly amplifies the threat impact as no physical presence or local network access is required for exploitation.
The operational impact of this vulnerability encompasses potential unauthorized access, data breaches, and system manipulation capabilities for attackers. Compromised devices may serve as entry points for further network infiltration, enabling lateral movement within corporate networks or as command and control nodes in botnet configurations. The vulnerability affects the device's integrity and availability, potentially disrupting network services and creating persistent backdoors for malicious actors.
Mitigation strategies should include immediate firmware updates from Tenda to address the identified command injection flaw. Network administrators should implement strict access controls and firewall rules limiting administrative access to these devices. Regular security assessments and network monitoring are essential to detect potential exploitation attempts. Additionally, implementing network segmentation and disabling unnecessary services can reduce the attack surface. The vulnerability aligns with ATT&CK technique T1059 which describes command and scripting interpreter usage for persistence and execution of malicious commands within compromised systems.