CVE-2026-51757

EUVD-2026-69200
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 49.6%
Common Weakness Enumeration
References
https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md
https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md
https://www.totolink.net/
https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html