CVE-2026-24432: Tenda W30e Firmware CSRF Vulnerability

CVE-2026-24432 Overview

CVE-2026-24432 is a Cross-Site Request Forgery (CSRF) vulnerability affecting Shenzhen Tenda W30E V2 firmware versions up to and including V16.01.0.19(5037). The firmware lacks CSRF protections on administrative endpoints, including those used to change administrator account credentials. As a result, an attacker can craft malicious requests that, when triggered by an authenticated user's browser, modify administrative passwords and other configuration settings without the user's knowledge or consent.

Critical Impact

Attackers can hijack administrator sessions and take complete control of affected Tenda W30E V2 devices by tricking authenticated users into visiting malicious web pages, potentially compromising network security and enabling further attacks.

Affected Products

• Tenda W30E V2 Firmware versions up to and including V16.01.0.19(5037)
• Tenda W30E hardware device
• tenda w30e_firmware

Discovery Timeline

• 2026-01-26 - CVE-2026-24432 published to NVD
• 2026-01-28 - Last updated in NVD database

Technical Details for CVE-2026-24432

Vulnerability Analysis

This vulnerability stems from the complete absence of Cross-Site Request Forgery protections on administrative endpoints within the Tenda W30E V2 firmware's web management interface. Administrative functions, including password changes and configuration modifications, can be executed without verifying that requests originate from legitimate user interactions within the authenticated session.

When an authenticated administrator visits a malicious webpage while logged into the router's management interface, the attacker-controlled page can automatically submit requests to the router. Since the browser automatically includes session cookies with these requests, the router processes them as legitimate administrative commands, allowing unauthorized configuration changes.

The vulnerability is classified as CWE-352 (Cross-Site Request Forgery), which occurs when a web application does not sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted it.

Root Cause

The root cause of CVE-2026-24432 is the absence of anti-CSRF tokens or other request validation mechanisms in the Tenda W30E V2 firmware's administrative web interface. The application fails to implement standard security controls such as:

• Unique per-session or per-request tokens that must accompany state-changing requests
• Origin header validation to verify requests come from the same domain
• SameSite cookie attributes to prevent cross-origin cookie transmission

Without these protections, the firmware cannot distinguish between legitimate administrative requests initiated by the user and malicious requests forged by attackers.

Attack Vector

The attack vector for this vulnerability is network-based and requires user interaction. An attacker must entice an authenticated administrator to visit a malicious webpage, click a link in a phishing email, or interact with attacker-controlled content while logged into the device's management interface.

The attacker crafts an HTML page containing hidden forms or JavaScript that automatically submits requests to the router's administrative endpoints. When the victim's browser loads this malicious content, it sends the forged requests to the router along with the valid session cookies, executing unauthorized administrative actions.

A typical attack scenario involves embedding an auto-submitting form that targets the password change endpoint. When the victim loads the attacker's page, the form submits with attacker-specified credentials, locking out the legitimate administrator and granting the attacker full device control.

Detection Methods for CVE-2026-24432

Indicators of Compromise

• Unexpected changes to administrator credentials or router configuration settings
• Unfamiliar administrative sessions or login activity in device logs
• Modified network settings such as DNS servers, firewall rules, or port forwarding configurations
• Browser history showing visits to suspicious external websites during active management sessions

Detection Strategies

• Monitor router logs for configuration changes that were not authorized or documented by administrators
• Implement network monitoring to detect unusual traffic patterns to and from the router's management interface
• Review browser history and security logs on administrator workstations for evidence of visits to suspicious domains
• Configure alerts for administrative password resets or credential modifications outside of scheduled maintenance windows

Monitoring Recommendations

• Enable logging of all administrative actions on the Tenda W30E device and forward logs to a centralized SIEM
• Implement network segmentation to isolate management interfaces from general user traffic
• Deploy web application firewalls or network intrusion detection systems to identify CSRF attack patterns
• Regularly audit device configurations against known-good baselines to detect unauthorized changes

How to Mitigate CVE-2026-24432

Immediate Actions Required

• Restrict access to the router's web management interface to trusted networks or specific IP addresses only
• Ensure administrators log out of the management interface immediately after completing administrative tasks
• Avoid browsing untrusted websites or clicking links in emails while authenticated to the device management interface
• Consider disabling remote web management and using only local console access for administration

Patch Information

No vendor patch information is currently available for CVE-2026-24432. Organizations should monitor the Tenda W30E Product Page and the VulnCheck Advisory for Tenda W30E for updates on security patches or firmware releases addressing this vulnerability.

Workarounds

• Implement network access controls to restrict management interface access to a dedicated administrative VLAN or specific trusted IP addresses
• Use browser session isolation by dedicating a separate browser profile or private browsing session exclusively for router administration
• Place the router management interface behind a VPN to require additional authentication before accessing administrative functions
• Consider deploying a reverse proxy with CSRF protection in front of the management interface as an additional defense layer

# Example: Restrict management access using firewall rules (if device supports CLI)
# Block external access to management port
iptables -A INPUT -p tcp --dport 80 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -s 192.168.1.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP