CVE-2026-51727
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 SystemSettings function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to retrieve administrative import and export endpoint information 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-2026-51727
EUVD
EUVD-2026-68714

Affected Vendors & Products

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

Helpful Resources

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 SystemSettings function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve administrative import and export endpoint information by sending a specially crafted POST request to the endpoint /cgi-bin/cstecgi.cgi.

Detection Guidance

To detect this vulnerability, scan for unauthenticated POST requests to /cgi-bin/cstecgi.cgi with parameters targeting SystemSettings. Check server logs for unusual access to administrative endpoints.

Impact Analysis

An attacker could exploit this to access sensitive administrative functions without authentication, potentially leading to unauthorized configuration changes, data exfiltration, or further compromise of the device.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest version. Restrict access to /cgi-bin/cstecgi.cgi via firewall rules. Disable unnecessary services and monitor for suspicious POST requests.

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