Description
Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the cs_broker component.
Published: 2026-09-01
Score: 9.8 Critical
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 03 Sep 2026 15:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Firmware Update Trigger via MQTT on TOTOLINK T6 Devices

Wed, 02 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 02 Sep 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


Tue, 01 Sep 2026 22:00:00 +0000

Type Values Removed Values Added
Title Unauthenticated Firmware Update Trigger via MQTT on TOTOLINK T6 Devices
First Time appeared Totolink
Totolink t6
Weaknesses CWE-284
Vendors & Products Totolink
Totolink t6

Tue, 01 Sep 2026 14:15:00 +0000

Type Values Removed Values Added
Description Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the cs_broker component.
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-02T17:46:50.700Z

Reserved: 2026-06-08T00:00:00.000Z

Link: CVE-2026-51760

cve-icon Vulnrichment

Updated: 2026-09-02T17:46:47.015Z

cve-icon NVD

Status : Received

Published: 2026-09-01T14:17:36.407

Modified: 2026-09-02T18:19:59.177

Link: CVE-2026-51760

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-03T14:45:04Z

Weaknesses