CVE-2026-51635
Deferred Deferred - Pending Action

Unauthenticated Access to Wi-Fi Scheduling in TOTOLINK T6

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: MITRE

Description
Incorrect access control in the getWiFiScheduleCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain Wi-Fi scheduling rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

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Meta Information

Published
2026-08-28
Last Modified
2026-08-28
Generated
2026-08-29
AI Q&A
2026-08-29
EPSS Evaluated
N/A
NVD
CVE-2026-51635
EUVD
EUVD-2026-67889

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 getWiFiScheduleCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve Wi-Fi scheduling rules by sending a specially crafted POST request to the vulnerable endpoint /cgi-bin/cstecgi.cgi.

Detection Guidance

To detect this vulnerability, check if your TOTOLINK T6 device running firmware 4.1.5cu.748_B20211015 is accessible via the web interface at /cgi-bin/cstecgi.cgi. Send a crafted POST request to this endpoint and inspect the response for Wi-Fi scheduling rules without authentication.

Impact Analysis

An attacker could exploit this to obtain sensitive Wi-Fi network configuration details, including scheduling rules. This information might be used to plan further attacks on the network, such as timing disruptions or identifying optimal attack windows.

Mitigation Strategies

Immediately update the TOTOLINK T6 firmware to the latest version. If no update is available, restrict access to the /cgi-bin/cstecgi.cgi endpoint via firewall rules or disable the web interface if not needed.

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