CVE-2026-51644

Deferred Deferred - Pending Action

Incorrect Access Control in TOTOLINK T6 Router

Publication date: 2026-08-28

Last updated on: 2026-09-01

Assigner: MITRE

Description

Incorrect access control in the getCrpcConfig function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain cloud remote-control status and URL information 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-2026-51644

EUVD

EUVD-2026-67922

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 getCrpcConfig function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve cloud remote-control status and URL information 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 unusual parameters targeting the getCrpcConfig function. Check logs for unauthenticated access attempts to this endpoint.

Impact Analysis

An attacker could exploit this to gain unauthorized access to sensitive cloud configuration details of the device, potentially leading to further attacks or information disclosure. This could compromise the privacy and security of the device and its users.

Compliance Impact

This vulnerability allows unauthenticated attackers to access cloud remote-control status and URL information, which could lead to unauthorized data exposure or control. Such access may violate compliance requirements under GDPR (data protection) or HIPAA (healthcare data security) by enabling unauthorized access to sensitive system configurations or data.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest version. Block external access to /cgi-bin/cstecgi.cgi via firewall rules. Disable unnecessary remote-control features if not in use.

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