CVE-2026-51735
Deferred Deferred - Pending Action

Incorrect Access Control in TOTOLINK T6 Firmware

Publication date: 2026-08-31

Last updated on: 2026-08-31

Assigner: MITRE

Description
Incorrect access control in the showSyslog function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to retrieve recent system logs via sending a crafted POST request to /cgi-bin/cstecgi.cgi.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-31
Last Modified
2026-08-31
Generated
2026-09-01
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-51735
EUVD
EUVD-2026-68751

Affected Vendors & Products

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

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an incorrect access control issue in the showSyslog function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to retrieve recent system logs by sending a specially crafted POST request to the /cgi-bin/cstecgi.cgi endpoint.

Detection Guidance

To detect this vulnerability, monitor network traffic for POST requests to /cgi-bin/cstecgi.cgi with parameters targeting the showSyslog function. Check system logs for unauthorized log retrieval attempts.

Impact Analysis

This vulnerability could allow attackers to access sensitive system logs without authentication. These logs may contain confidential information such as network activity, device configurations, or other operational details that could be used for further attacks or privacy violations.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, potentially violating privacy regulations like GDPR or HIPAA if the logs contain personal or health information. Organizations using affected TOTOLINK T6 devices may face compliance risks due to insufficient access controls.

Mitigation Strategies

Immediately update TOTOLINK T6 firmware to the latest patched version. Block external access to /cgi-bin/cstecgi.cgi via firewall rules. Disable unnecessary services and restrict access to administrative interfaces.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-51735. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart