CVE-2026-51631

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 getStaticDhcpRules function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain WPS runtime status 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

2026-08-28

Generated

2026-08-29

AI Q&A

2026-08-29

EPSS Evaluated

N/A

NVD

CVE-2026-51631

EUVD

EUVD-2026-67893

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 TOTOLINK T6 router firmware version 4.1.5cu.748_B20211015. It exists in the getStaticDhcpRules function, which improperly restricts access to sensitive information. An unauthenticated attacker can exploit this by sending a specially crafted POST request to the router's web interface endpoint /cgi-bin/cstecgi.cgi to retrieve the WPS runtime status.

Impact Analysis

This vulnerability allows attackers to gain unauthorized access to the WPS runtime status of your TOTOLINK T6 router without authentication. This could expose network configuration details, potentially aiding further attacks against your home or small office network. Attackers might use this information to identify weaknesses or launch additional exploits targeting your router or connected devices.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest patched version. Disable remote administration features if not required. Restrict access to the /cgi-bin/cstecgi.cgi endpoint via network firewall rules. Monitor network traffic for unusual POST requests to this path.

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