CVE-2026-2137 in TX3
Summary
by MITRE • 02/08/2026
A vulnerability has been found in Tenda TX3 up to 16.03.13.11_multi. This impacts an unknown function of the file /goform/SetIpMacBind. The manipulation of the argument list leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.
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Analysis
by VulDB Data Team • 02/09/2026
The vulnerability identified as CVE-2026-2137 affects the Tenda TX3 router firmware version 16.03.13.11_multi and represents a critical buffer overflow flaw within the device's web interface functionality. This issue resides in the /goform/SetIpMacBind file which handles IP-MAC binding configurations through the web administration interface. The vulnerability stems from improper input validation and handling of arguments passed to this specific function, creating an exploitable condition that allows attackers to manipulate the argument list in ways that exceed allocated buffer boundaries. The affected router model represents a common consumer-grade networking device that many users deploy in home and small office environments, making this vulnerability particularly concerning due to its widespread deployment and the potential for remote exploitation.
The technical exploitation of this buffer overflow vulnerability occurs through the manipulation of parameters sent to the SetIpMacBind function, which is typically accessed via HTTP requests to the router's web interface. When an attacker crafts malicious input parameters that exceed the expected buffer size, the overflow can overwrite adjacent memory locations, potentially leading to arbitrary code execution or system instability. This vulnerability operates at the application layer and specifically targets the router's web server component that processes administrative requests. The attack vector is remote, meaning an unauthenticated attacker can exploit this weakness without requiring physical access to the device or local network presence. The public disclosure of exploit code further amplifies the risk, as it removes the requirement for advanced technical knowledge to leverage this vulnerability effectively.
The operational impact of this vulnerability extends beyond simple denial of service conditions, as successful exploitation could enable attackers to gain full administrative control over affected routers. This compromised device could then be used as a pivot point for further attacks within local networks, potentially leading to data exfiltration, man-in-the-middle attacks, or the creation of botnets for distributed denial of service attacks. The implications are particularly severe in environments where these routers serve as the primary network gateway, as they may control access to critical internal systems and provide a direct pathway to sensitive corporate or personal data. Network administrators face the additional challenge of identifying potentially compromised devices within their networks, as the attack may not produce obvious signs of compromise and could remain undetected for extended periods.
Mitigation strategies for this vulnerability should prioritize immediate firmware updates from Tenda, as the manufacturer is likely to release patches addressing the buffer overflow condition in the SetIpMacBind function. Network segmentation and access control measures should be implemented to limit the potential impact of exploitation, including restricting remote administrative access to the router interface and implementing network monitoring to detect anomalous traffic patterns. Additional protective measures include disabling unnecessary services, implementing strong authentication mechanisms, and conducting regular network audits to identify potentially compromised devices. The vulnerability aligns with CWE-121 buffer overflow conditions and may map to ATT&CK techniques involving privilege escalation and remote code execution within the network infrastructure domain. Organizations should also consider implementing intrusion detection systems to monitor for exploitation attempts and maintain updated threat intelligence feeds to track emerging exploitation patterns related to this specific vulnerability.