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9.8

CVE-2026-51757: TOTOLINK T6 router lets strangers trigger firmware update

CVE-2026-51757 · published 2 days ago
Summary

The T6 router version 4.1.5 allows anyone on the network to start a firmware download or flashing process on a connected device. This could let an attacker load malicious software or disrupt the device. Update the router firmware to a version that fixes the access control, or restrict network access to trusted devices only.

Original advisory text
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...
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.
Severity
9.8 Critical
Exploitation
EPSS <1%
Type
CWE-284Improper Access Control
Timeline
Published1 Sep 2026
Updated2 Sep 2026
First seen1 Sep 2026
Sources
CVE-2026-51757 · MITRE
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