CVE-2026-108917 in BR-6208AC
Summary
by MITRE • 10/12/2026
A vulnerability was determined in Edimax BR-6208AC 1.32. This issue affects some unknown processing of the file /goform/formAutoFWupgrade. Executing a manipulation of the argument tftpsIP can lead to command injection. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way. This vulnerability only affects products that are no longer supported by the maintainer.
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Analysis
by VulDB Data Team • 10/12/2026
The Edimax BR-6208AC wireless router, specifically running firmware version 1.32, contains a critical security flaw within its web-based management interface that allows for remote command injection. This vulnerability resides in the processing logic of the /goform/formAutoFWupgrade endpoint, which is responsible for handling automatic firmware upgrade requests. The core technical issue stems from insufficient input validation and sanitization mechanisms applied to the tftpsIP argument passed during this process. When an attacker crafts a malicious HTTP request containing specially formatted data within the tftpsIP parameter, they can inject arbitrary operating system commands that are executed with the privileges of the web server or underlying firmware processes. This lack of proper boundary checking allows shell metacharacters to break out of intended context and interact directly with the device's command interpreter.
From a technical classification perspective, this vulnerability aligns closely with CWE-78, which defines Improper Neutralization of Special Elements used in an OS Command (OS Command Injection). The flaw represents a classic instance where user-supplied input is concatenated into system commands without adequate filtering or escaping. Because the affected endpoint handles network configuration parameters related to firmware updates via TFTP, the potential for exploitation is heightened by the fact that it accepts IP addresses and potentially other network-related strings from remote sources. The absence of strict type checking allows attackers to append command separators such as semicolons or pipes, thereby chaining additional commands after the intended operation. This enables full control over the underlying Linux-based operating system running on the router hardware.
The operational impact of this vulnerability is severe due to its remote nature and public availability. Since the exploit has been publicly disclosed, automated scanning tools and malicious actors can easily locate vulnerable devices across the internet without requiring specialized knowledge or custom tooling. An attacker who successfully exploits this flaw gains arbitrary code execution capabilities on the target device. This typically results in complete compromise of the router's integrity, allowing the adversary to pivot into internal networks, intercept traffic, install persistent backdoors, or use the compromised device as part of a botnet for distributed denial-of-service attacks. The severity is further exacerbated by the fact that this specific model and firmware version are no longer supported by Edimax. Consequently, there will be no official patches, security updates, or mitigation guidance released to address this issue in production environments still running vulnerable versions.
Mitigation strategies must therefore focus on network-level controls rather than software remediation. Organizations and individuals utilizing the Edimax BR-6208AC should immediately isolate these devices from untrusted networks by restricting access to the management interface through firewall rules or VLAN segmentation. It is critical to disable remote administration features if they are not strictly necessary, ensuring that configuration changes can only be made from trusted local network segments. Additionally, replacing unsupported hardware with modern, actively maintained routers equipped with regular security updates and robust input validation frameworks remains the most effective long-term solution. Until such replacement occurs, continuous monitoring of device logs for anomalous outbound connections or unusual CPU usage patterns may help detect active exploitation attempts in real time.