CVE-2026-82694 Overview
CVE-2026-82694 is a missing authentication vulnerability [CWE-287] in the Tenda AC1206 wireless router running firmware version 15.03.06.23. The flaw resides in the R7WebsSecurityHandler function processing requests to the /goform/ate endpoint of the Web UI. Attackers can reach the vulnerable handler over the network without any credentials or user interaction. Public exploit details are available, increasing the likelihood of opportunistic exploitation against exposed devices.
Critical Impact
Unauthenticated remote attackers can invoke administrative Web UI functionality on affected Tenda AC1206 routers, compromising confidentiality, integrity, and availability of the device and the network segments it serves.
Affected Products
- Tenda AC1206 router
- Firmware version 15.03.06.23
- /goform/ate endpoint served by the Web UI component
Discovery Timeline
- 2026-08-31 - CVE-2026-82694 published to NVD
- 2026-08-31 - Last updated in NVD database
Technical Details for CVE-2026-82694
Vulnerability Analysis
The Tenda AC1206 Web UI exposes the /goform/ate endpoint, which is handled by the R7WebsSecurityHandler function in the router's HTTP server. This handler enforces access control for sensitive administrative operations. The implementation fails to require authentication before processing requests, so any client that can reach the Web UI over the network can invoke privileged functionality. The endpoint is commonly used for factory test and diagnostic commands, which typically execute with elevated privileges on the device.
Root Cause
The root cause is a missing authentication check [CWE-287] within R7WebsSecurityHandler. The function accepts requests to /goform/ate without validating a session token, credential, or authorization state. Because the ATE (Auto Test Equipment) interface is designed for factory provisioning, its exposure through the Web UI on production firmware constitutes an insecure default configuration.
Attack Vector
The attack is network-based, requires no privileges, and requires no user interaction. An attacker sends a crafted HTTP request to /goform/ate on the router's Web UI port. Where the router's management interface is reachable from the WAN or from an untrusted LAN segment, the attacker gains access to functionality intended for authenticated administrators.
No verified proof-of-concept code is reproduced here. Technical details describing the request format and impacted parameters are published in the GitHub Command Injection Report and the VulDB CVE-2026-82694 Entry.
Detection Methods for CVE-2026-82694
Indicators of Compromise
- Unexpected HTTP GET or POST requests to /goform/ate on Tenda AC1206 Web UI ports from untrusted source addresses.
- Configuration changes on the router (DNS, routing, admin credentials) that do not correspond to authenticated administrator sessions.
- Outbound connections from the router to unfamiliar external hosts, indicating post-exploitation activity.
Detection Strategies
- Inspect network flows and HTTP proxy logs for requests targeting the /goform/ate URI, particularly those lacking prior authenticated session cookies.
- Alert on Web UI access to the router from WAN interfaces or from client subnets that should not administer network infrastructure.
- Baseline router configuration and generate alerts when firmware, DNS, or NAT settings change outside of maintenance windows.
Monitoring Recommendations
- Forward router syslog and HTTP access logs to a centralized logging or SIEM platform for retention and correlation.
- Monitor for scanning activity probing /goform/ paths across the environment, indicating reconnaissance for Tenda-specific endpoints.
- Track DHCP and ARP tables for anomalous devices that could indicate a compromised gateway redirecting traffic.
How to Mitigate CVE-2026-82694
Immediate Actions Required
- Restrict Web UI access on Tenda AC1206 devices to trusted management subnets only, and disable remote (WAN-side) administration.
- Place affected routers behind a network segment that blocks inbound HTTP to the Web UI from untrusted zones.
- Rotate router administrator credentials and Wi-Fi pre-shared keys after confirming the device is not already compromised.
- Contact Tenda through the Tenda Official Website to obtain firmware guidance for AC1206 15.03.06.23.
Patch Information
At the time of publication, no vendor-supplied patch is referenced in the NVD entry for CVE-2026-82694. Consult the VulDB CVE-2026-82694 Entry and Tenda support channels for updated firmware availability. Where a vendor fix is unavailable, treat the device as end-of-support for exposed deployments and consider replacement.
Workarounds
- Block inbound traffic to the router's Web UI TCP port from the WAN interface using upstream firewall rules.
- Apply access control lists on the LAN switch to permit management traffic to the router only from designated administrator hosts.
- Disable the ATE / factory test interface if the firmware exposes a configuration toggle, and audit /goform/* handlers via a reverse proxy that requires authentication.
# Example iptables rule to block external access to the router Web UI
iptables -A INPUT -i wan0 -p tcp --dport 80 -j DROP
iptables -A INPUT -i wan0 -p tcp --dport 443 -j DROP
# Restrict LAN Web UI access to a single admin host
iptables -A INPUT -p tcp --dport 80 ! -s 192.0.2.10 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
