CVE-2026-51700
Received Received - Intake

Incorrect Access Control in TOTOLINK T6 Firmware

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: MITRE

Description
Incorrect access control in the setWiFiAdvancedCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to degrade wireless behavior via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

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Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-51700
EUVD
EUVD-2026-68650

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink t6 4.1.5cu.748_b20211015

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an incorrect access control issue in the setWiFiAdvancedCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to degrade wireless network behavior by sending a specially crafted POST request to the vulnerable endpoint /cgi-bin/cstecgi.cgi.

Detection Guidance

Detecting this vulnerability requires checking for unauthorized POST requests to /cgi-bin/cstecgi.cgi targeting the setWiFiAdvancedCfg function. Monitor network traffic for suspicious POST requests to this endpoint with parameters related to WiFi configuration.

Impact Analysis

If exploited, this vulnerability could allow attackers to disrupt or degrade your wireless network performance without needing authentication. This may lead to intermittent connectivity issues, reduced network speeds, or complete loss of wireless functionality for affected devices.

Mitigation Strategies

Immediately update the TOTOLINK T6 firmware to the latest version if available. Disable remote administration features if not needed. Restrict access to the web interface to trusted networks only. Monitor network traffic for unusual POST requests to /cgi-bin/cstecgi.cgi.

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