CVE-2026-51659

Deferred Deferred - Pending Action

Unauthenticated Access to DMZ Config in TOTOLINK T6

Publication date: 2026-08-28

Last updated on: 2026-08-28

Assigner: MITRE

Description

Incorrect access control in the getUrlFilterRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain DMZ 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-2026-51659

EUVD

EUVD-2026-67875

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 getUrlFilterRules function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve DMZ configuration details by sending a specially crafted POST request to the vulnerable endpoint /cgi-bin/cstecgi.cgi.

Impact Analysis

An attacker could exploit this to gain unauthorized access to network configuration details, potentially exposing sensitive network settings like DMZ configurations. This could lead to further attacks on the network or compromise of connected devices.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest version to address the incorrect access control in getUrlFilterRules. Disable remote management features if not required and restrict access to the web interface via network segmentation or firewall rules.

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