CVE-2026-51642

Deferred Deferred - Pending Action

Incorrect Access Control in TOTOLINK T6 Firmware

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: MITRE

Description

Incorrect access control in the getMeshRoutingTable function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain mesh routing 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-2026-51642

EUVD

EUVD-2026-67924

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

Detection Guidance

To detect this vulnerability, monitor network traffic for POST requests to /cgi-bin/cstecgi.cgi with parameters targeting the getMeshRoutingTable function. Check server logs for unauthorized access attempts or unusual mesh routing data requests.

Impact Analysis

An attacker could exploit this to gather sensitive network routing details without authentication, potentially enabling further attacks like network mapping, man-in-the-middle, or unauthorized access to connected devices.

Mitigation Strategies

Immediately update the 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 to the affected endpoint.

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