CVE-2026-51769
Received Received - Intake

Incorrect Access Control in TOTOLINK T6 Firmware

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: MITRE

Description
Incorrect access control in the remoteCloudUpdateCheck function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to restart the cloud update check workflow via sending a crafted MQTT message to the cs_broker component.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-51769
EUVD
EUVD-2026-69379

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 remoteCloudUpdateCheck function of TOTOLINK T6 firmware version 4.1.5cu.748_B20211015. It allows unauthenticated attackers to restart the cloud update check workflow by sending a specially crafted MQTT message to the cs_broker component.

Impact Analysis

An attacker could exploit this to trigger unnecessary cloud update checks, potentially causing network disruption or exposing sensitive information during the update process. It may also allow attackers to manipulate update behavior for further exploitation.

Compliance Impact

This vulnerability allows unauthenticated attackers to manipulate the cloud update check workflow via crafted MQTT messages, which could lead to unauthorized access or control of the device. This may violate compliance requirements under GDPR (data protection) and HIPAA (healthcare data security) by enabling unauthorized access to sensitive data or systems.

Mitigation Strategies

Disable the cloud update check feature in TOTOLINK T6 firmware or block MQTT messages to the cs_broker component at the network level until a patch is available.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-51769. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart