CVE-2026-51747

The TOTOLINK T6 (firmware version 4.1.5cu.748_B20211015 ) is vulnerable to an incorrect access control flaw within the keepAlive function. This vulnerability allows unauthenticated attackers to emit indirect mesh heartbeat information toward the master node by sending a crafted MQTT message to th...

EUVD-2026-69209

Incorrect access control in the recvmeshinfosync function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to force mesh configuration synchronization from an attacker-controlled host via sending a crafted MQTT message to the csbroker component...

PT-2026-84203

Incorrect access control in the discoverWan function of TOTOLINK T6 4.1.5cu.748 B20211015 allows unauthenticated attackers to trigger WAN discovery logic via sending a crafted POST request to /cgi-bin/cstecgi.cgi...

PT-2026-84311

Incorrect access control in the recvClearPairCfg function of TOTOLINK T6 4.1.5cu.748 B20211015 allows unauthenticated attackers to reset pairing state and reboot the device via sending a crafted MQTT message to the cs broker component...

EUVD-2026-69378

Incorrect access control in the setElinkQosConfig function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to modify privileged QoS policy on the master device via sending a crafted MQTT message to the csbroker component...

CVE-2026-51765: Improper Access Control

Incorrect access control in the recvIndirectMeshInfo function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to insert or replace mesh neighbor records via sending a crafted MQTT message to the csbroker component...

CVE-2026-51765

Incorrect access control in the recvIndirectMeshInfo function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to insert or replace mesh neighbor records via sending a crafted MQTT message to the csbroker component...

CVE-2026-51762: Improper Access Control

Incorrect access control in the meshInfoKick function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to kick or clean stale mesh information/state and trigger regeneration of mesh metadata via sending a crafted MQTT message to the csbroker component...

CVE-2026-51769: Improper Access Control

Incorrect access control in the remoteCloudUpdateCheck function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to restart the cloud update check workflow via sending a crafted MQTT message to the csbroker component...

CVE-2026-51741: Improper Access Control

Incorrect access control in the clearDiagnosisLog function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to erase diagnosis logs via sending a crafted POST request to /cgi-bin/cstecgi.cgi...

CVE-2026-51750: Improper Access Control

Incorrect access control in the updatePriChannel function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to rescan and switch the primary mesh channel via sending a crafted MQTT message to the csbroker component...

CVE-2026-51770: Improper Access Control

Incorrect access control in the sendToMasterQosConfig function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to forward attacker-controlled QoS settings to the master via sending a crafted MQTT message to the csbroker component...

CVE-2026-51742

Incorrect access control in the discoverWan function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to trigger WAN discovery logic via sending a crafted POST request to /cgi-bin/cstecgi.cgi...

PT-2026-84312

Incorrect access control in the setElinkQosConfig function of TOTOLINK T6 4.1.5cu.748 B20211015 allows unauthenticated attackers to modify privileged QoS policy on the master device via sending a crafted MQTT message to the cs broker component...

CVE-2026-51768

The TOTOLINK T6 running firmware version 4.1.5cu.748_B20211015 is vulnerable to an incorrect access control flaw in the setElinkQosConfig function. This vulnerability allows unauthenticated attackers to modify privileged QoS policies on the master device by sending a crafted MQTT message to the c...

CVE-2026-51766: Improper Access Control

Incorrect access control in the setDevReboot function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to reboot the local device and, on a master, fan out reboot commands to mesh slaves via sending a crafted MQTT message to the csbroker component...

EUVD-2026-69194

Incorrect access control in the recvIndirectMeshInfo function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to insert or replace mesh neighbor records via sending a crafted MQTT message to the csbroker component...

EUVD-2026-69377

Incorrect access control in the recvClearPairCfg function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to reset pairing state and reboot the device via sending a crafted MQTT message to the csbroker component...

PT-2026-84240

Name of the Vulnerable Software and Affected Versions TOTOLINK T6 version 4.1.5cu.748 B20211015 Description Incorrect access control in the informSyncUpgfw function allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves. This is achieved by sending a crafted...

EUVD-2026-69212

Incorrect access control in the clearDiagnosisLog function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to erase diagnosis logs via sending a crafted POST request to /cgi-bin/cstecgi.cgi...