CVE-2026-51643

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 getNtpCfg function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to obtain NTP configuration and current time data 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-2026-51643

EUVD

EUVD-2026-67923

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 getNtpCfg function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve NTP configuration and current time data 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 related to NTP configuration. Check logs for unauthorized access attempts to this endpoint.

Impact Analysis

An attacker could exploit this to gather sensitive network time protocol settings and current time data without authentication. This may aid in further attacks like timing-based exploits or network reconnaissance, though direct data theft or system compromise is not indicated by this specific vulnerability.

Mitigation Strategies

Immediately update the TOTOLINK T6 firmware to the latest version. Block external access to the /cgi-bin/cstecgi.cgi endpoint via firewall rules. Disable unnecessary services and restrict network access to trusted IPs.

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