CVE-2026-51618

Deferred Deferred - Pending Action

Incorrect Access Control in TOTOLINK T6 Router Configuration Disclosure

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: MITRE

Description

Incorrect access control in the getWizardCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain setup wizard and onboarding configuration information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

CVSS Scores

EPSS Scores

Probability:
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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-2026-51618

EUVD

EUVD-2026-67908

Affected Vendors & Products

Vendor	Product	Version / Range
totolink	t6	4.1.5cu.748_b20211015

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability is an incorrect access control issue in the getWizardCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve setup wizard and onboarding configuration details 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 affected endpoint. Send a crafted POST request to /cgi-bin/cstecgi.cgi and verify if it returns setup wizard or onboarding configuration information without authentication.

Impact Analysis

An attacker could exploit this to gain sensitive configuration information about the device, potentially leading to further attacks such as unauthorized access, network compromise, or bypassing security controls.

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 network firewall rules or disable the web interface if not needed.

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