CVE-2026-8263 in AC6
Summary
by MITRE • 05/11/2026
A security flaw has been discovered in Tenda AC6 15.03.06.49_multi_TDE01. Affected is the function fromSetWirelessRepeat of the file /goform/WifiExtraSet of the component httpd. Performing a manipulation of the argument mac/ssid results in os command injection. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.
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Analysis
by VulDB Data Team • 07/24/2026
The vulnerability identified in Tenda AC6 router firmware version 15.03.06.49_multi_TDE01 represents a critical command injection flaw within the web-based administration interface. This security weakness resides in the httpd component's function fromSetWirelessRepeat located in the /goform/WifiExtraSet file, demonstrating poor input validation and sanitization practices that create an exploitable pathway for remote attackers. The vulnerability specifically affects the manipulation of mac/ssid parameters, which when improperly handled can lead to arbitrary code execution on the affected device. This flaw operates at the application layer and represents a direct violation of secure coding principles, as it allows untrusted input to be directly incorporated into system commands without proper sanitization or escaping mechanisms.
The technical exploitation of this vulnerability follows a well-documented pattern that aligns with CWE-78, which describes improper neutralization of special elements used in OS commands. Attackers can leverage this flaw by crafting malicious inputs that contain shell metacharacters and command injection sequences, enabling them to execute arbitrary operating system commands with the privileges of the web server process. The remote attack vector eliminates the need for physical access or local network presence, making this vulnerability particularly dangerous as it can be exploited from anywhere on the internet. This capability directly maps to ATT&CK technique T1059.001 for command and scripting interpreter, specifically shell scripting, and represents a significant elevation of privilege threat that could allow attackers to gain complete control over the affected device.
The operational impact of this vulnerability extends beyond simple remote code execution to encompass full device compromise and potential network infiltration. Once exploited, attackers can establish persistent access to the router, potentially using it as a pivot point for broader network attacks or as a command and control server for other compromised devices. The affected device becomes vulnerable to various attack vectors including but not limited to DNS tunneling, port scanning, and network traffic interception. The release of public exploits for this vulnerability increases the risk profile significantly, as it removes the barrier to entry for potential attackers who may not possess advanced exploitation skills. Organizations and individuals with impacted devices face immediate security risks that could lead to data breaches, service disruption, or use in larger distributed attack campaigns.
Mitigation strategies should prioritize immediate firmware updates from Tenda if available, as this represents the most effective defense against the known exploit. Network segmentation and firewall rules can provide temporary protection by blocking access to the web administration interface from untrusted networks, though this approach is not foolproof given the remote nature of the vulnerability. Additionally, implementing network monitoring solutions that can detect unusual command execution patterns or suspicious network traffic originating from affected devices can help identify exploitation attempts. Organizations should also consider disabling unnecessary wireless features and implementing strong authentication measures to reduce the attack surface. The vulnerability highlights the importance of secure input validation practices and proper sanitization of user-supplied data in web applications, aligning with security standards such as OWASP Top Ten and NIST cybersecurity guidelines for embedded system security. Regular security assessments and vulnerability scanning should be conducted to identify similar issues in other network equipment and ensure comprehensive protection against command injection threats.