CVE-2026-51663

Deferred Deferred - Pending Action

Incorrect Access Control in TOTOLINK T6 Allows Unauthenticated Wireless Scan

Publication date: 2026-08-28

Last updated on: 2026-09-01

Assigner: MITRE

Description

Incorrect access control in the getWiFiApcliScan function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to trigger wireless scans and retrieve AP-client scan results via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-08-28

Last Modified

2026-09-01

Generated

2026-09-18

AI Q&A

2026-08-29

EPSS Evaluated

2026-09-15

NVD

CVE-2026-51663

EUVD

EUVD-2026-68009

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability is an incorrect access control issue in the getWiFiApcliScan function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to remotely trigger wireless scans and retrieve access point client scan results by sending a specially crafted POST request to the vulnerable endpoint /cgi-bin/cstecgi.cgi.

Detection Guidance

To detect this vulnerability, monitor network traffic for POST requests to /cgi-bin/cstecgi.cgi with parameters targeting the getWiFiApcliScan function. Check logs for unauthenticated access attempts to this endpoint.

Impact Analysis

This vulnerability could allow attackers to gather sensitive wireless network information without authentication. This includes details about nearby access points and connected clients, which could be used for further attacks like network reconnaissance, man-in-the-middle attacks, or unauthorized access to the network.

Compliance Impact

This vulnerability allows unauthenticated access to wireless scan results, which could expose sensitive network information. Such unauthorized data access may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data privacy) by enabling unauthorized data retrieval without proper authentication or authorization.

Mitigation Strategies

Immediately update the TOTOLINK T6 firmware to the latest version. Block external access to /cgi-bin/cstecgi.cgi via firewall rules. Disable unnecessary services and restrict network access to trusted IPs.

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