CVE-2026-51614
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 getAccessDeviceCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain access-device policy and client state information via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

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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-2026-51614
EUVD
EUVD-2026-67912

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

CVE-2026-51614 is a missing authentication vulnerability in TOTOLINK T6 router firmware version 4.1.5cu.748_B20211015. The flaw is in the getAccessDeviceCfg function of the cstecgi.cgi component. An unauthenticated attacker can send a crafted HTTP POST request to /cgi-bin/cstecgi.cgi with the parameter {"topicurl":"getAccessDeviceCfg"} to retrieve sensitive access-device policy and client state information.

Detection Guidance

To detect this vulnerability, check if your TOTOLINK T6 router is running firmware version 4.1.5cu.748_B20211015. Send a crafted POST request to /cgi-bin/cstecgi.cgi with the parameter {"topicurl":"getAccessDeviceCfg"} and verify if sensitive information is returned without authentication.

Impact Analysis

This vulnerability allows unauthenticated attackers to obtain sensitive network configuration details, including access-device policies and client state information. This could lead to further attacks like unauthorized network access, data breaches, or device compromise.

Mitigation Strategies

Immediately update the TOTOLINK T6 router firmware to a patched version. If no patch is available, restrict access to the router's web interface via network segmentation or firewall rules until an update is applied.

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