CVE-2026-6024: Tenda i6 Path Traversal Vulnerability

CVE-2026-6024 Overview

A path traversal vulnerability has been identified in Tenda i6 firmware version 1.0.0.7(2204). The vulnerability exists within the R7WebsSecurityHandlerfunction function of the HTTP Handler component. This flaw allows remote attackers to manipulate input parameters to traverse directory paths, potentially accessing files and directories outside the intended scope. The exploit has been publicly disclosed and may be utilized by threat actors targeting vulnerable Tenda i6 devices.

Critical Impact

Remote attackers can exploit this path traversal vulnerability to access sensitive files, configuration data, or other protected resources on affected Tenda i6 devices without authentication.

Affected Products

• Tenda i6 firmware version 1.0.0.7(2204)

Discovery Timeline

• 2026-04-10 - CVE CVE-2026-6024 published to NVD
• 2026-04-13 - Last updated in NVD database

Technical Details for CVE-2026-6024

Vulnerability Analysis

This path traversal vulnerability (CWE-22) affects the R7WebsSecurityHandlerfunction within the Tenda i6's HTTP Handler component. Path traversal vulnerabilities occur when user-controllable input is used to construct file paths without proper sanitization, allowing attackers to use special character sequences like ../ to escape the intended directory and access arbitrary files on the system.

The vulnerability is particularly concerning for network infrastructure devices like the Tenda i6, as successful exploitation could expose sensitive configuration files, credentials, or allow attackers to read system files that could facilitate further attacks on the network.

Root Cause

The root cause of this vulnerability is improper input validation within the R7WebsSecurityHandlerfunction function. The function fails to properly sanitize user-supplied input before using it in file path operations, allowing directory traversal sequences to be processed. This missing input sanitization enables attackers to navigate outside the web root directory and access files that should be restricted.

Attack Vector

The attack can be initiated remotely over the network without requiring authentication or user interaction. An attacker sends specially crafted HTTP requests containing directory traversal sequences (such as ../ or encoded variants) to the vulnerable HTTP Handler. When processed by the R7WebsSecurityHandlerfunction, these sequences allow the attacker to read files outside the intended directory structure.

The vulnerability mechanism involves manipulating path parameters in HTTP requests to the affected handler function. Attackers can construct requests that include relative path components to traverse the directory structure. For detailed technical information and proof-of-concept details, refer to the GitHub PoC Repository and VulDB #356600.

Detection Methods for CVE-2026-6024

Indicators of Compromise

• HTTP requests to the Tenda i6 device containing path traversal sequences such as ../, ..%2f, %2e%2e/, or similar encoded variants
• Unusual file access patterns in device logs indicating attempts to access files outside the web directory
• HTTP requests targeting the R7WebsSecurityHandlerfunction endpoint with abnormally long or suspicious path parameters
• Evidence of configuration file or sensitive data exfiltration from the device

Detection Strategies

• Implement intrusion detection system (IDS) rules to detect path traversal patterns in HTTP traffic destined for Tenda i6 devices
• Monitor web server logs for requests containing directory traversal character sequences targeting the HTTP Handler
• Deploy network-based detection to identify anomalous HTTP requests with encoded path traversal attempts
• Conduct periodic firmware integrity checks to identify unauthorized access or modifications

Monitoring Recommendations

• Enable comprehensive logging on Tenda i6 devices and forward logs to a centralized SIEM for analysis
• Monitor network traffic for unusual data transfers from the device that may indicate successful exploitation
• Implement file integrity monitoring on critical system and configuration files where possible
• Establish baseline network behavior for Tenda i6 devices to identify anomalous connection patterns

How to Mitigate CVE-2026-6024

Immediate Actions Required

• Restrict network access to Tenda i6 devices to trusted management networks only using firewall rules or network segmentation
• Disable remote management interfaces if not strictly required for operations
• Implement web application firewall (WAF) rules to block requests containing path traversal sequences
• Monitor devices for signs of exploitation while awaiting a vendor patch

Patch Information

At the time of this publication, no official patch has been released by Tenda for this vulnerability. Organizations should monitor the Tenda official website for security updates and apply patches immediately upon availability. Additional vulnerability details can be found at VulDB #356600 and the VulDB Submission Page.

Workarounds

• Place affected Tenda i6 devices behind a network firewall or reverse proxy that can filter malicious path traversal requests
• Implement access control lists (ACLs) to restrict HTTP access to the device from untrusted networks
• Consider replacing vulnerable devices with alternative products if the vendor does not provide a timely patch
• If device functionality permits, disable the HTTP Handler or restrict access to specific trusted IP addresses

# Example firewall rule to restrict access to Tenda device management interface
# Replace 192.168.1.100 with your Tenda i6 IP and 10.0.0.0/24 with trusted management network
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 80 -s ! 10.0.0.0/24 -j DROP
iptables -A FORWARD -d 192.168.1.100 -p tcp --dport 443 -s ! 10.0.0.0/24 -j DROP