CVE-2026-51670
Received Received - Intake

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 getSlaveUpdate function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to query slave upgrade status and affect upgrade bookkeeping 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
2026-08-31
AI Q&A
2026-08-31
EPSS Evaluated
N/A
NVD
CVE-2026-51670
EUVD
EUVD-2026-68533

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 getSlaveUpdate function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to query slave upgrade status and manipulate upgrade bookkeeping by sending a specially crafted POST request to /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 getSlaveUpdate function. Check logs for unauthenticated access attempts to this endpoint.

Impact Analysis

An attacker could exploit this to gain unauthorized access to device upgrade information, potentially disrupting firmware updates or causing inconsistent upgrade tracking. This may lead to security gaps if malicious firmware is installed or legitimate updates are blocked.

Compliance Impact

This vulnerability allows unauthenticated attackers to query slave upgrade status, which could lead to unauthorized access or manipulation of device firmware. This may violate compliance requirements for data integrity and access control under standards like GDPR (data protection) and HIPAA (healthcare data security) if exploited.

Mitigation Strategies

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

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-51670. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart