CVE-2026-51715
Received Received - Intake

Incorrect Access Control in TOTOLINK T6 Router

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: MITRE

Description
Incorrect access control in the delMacFilterRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to remove MAC filter rules via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

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Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-51715
EUVD
EUVD-2026-68634

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
totolink t6 4.1.5cu.748_b20211015

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is an incorrect access control issue in the delMacFilterRules function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to remove MAC filter rules 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 delMacFilterRules function. Check logs for unauthorized MAC filter rule modifications.

Impact Analysis

This vulnerability could allow attackers to bypass network access controls by removing MAC filter rules, potentially enabling unauthorized access to the network or connected devices. It compromises the intended security restrictions set by administrators.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest version. Disable remote administration if not needed. Restrict access to /cgi-bin/cstecgi.cgi via firewall rules. Monitor for suspicious POST requests to this endpoint.

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