CVE-2026-51757

State: Published
Severity: 9.8 Critical
Published: Sep 1, 2026
Updated: Sep 2, 2026
Reserved: Jun 8, 2026

Description

Incorrect access control in the meshSlaveUpdate function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to start a firmware download or flash workflow on the slave device via sending a crafted MQTT message to the cs_broker component.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-284 Improper Access Control

Affected Products

Product	Versions
n/an/a	n/aAffected

References

https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html
https://www.totolink.net/
https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md
https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md

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