CVE-2026-51747

TOTOLINK T6 mesh Wi-Fi routers (firmware 4.1.5cu.748_B20211015 ) suffer from an incorrect access control flaw in the keepAlive function. An unauthenticated network attacker can send a crafted MQTT message to the cs_broker component to emit indirect mesh heartbeat information toward the master nod...

CVE-2026-51762

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...

EUVD-2026-69196

Incorrect access control in the freeStaClient function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to forcibly disconnect wireless clients via sending a crafted MQTT message to the csbroker component...

CVE-2026-51752

Incorrect access control in the staticInfoSend function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to trigger static information reporting to the configured master via sending a crafted MQTT message to the csbroker component...

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...

CVE-2026-51764

An incorrect access control flaw in the recvSlaveCloudCheckStatus function of the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015 ) allows an unauthenticated remote attacker to overwrite cloud-result tracking files by sending a crafted MQTT message to the cs_broker component. The CVSS 3.1 scor...

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...

EUVD-2026-69379

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-2026-51762

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-2026-51751

CVE-2026-51751 is a critical (CVSS 9.8) incorrect access control vulnerability in the delSlaveDevice function of TOTOLINK T6 (firmware 4.1.5cu.748_B20211015). An unauthenticated network attacker can send a crafted MQTT message to the cs_broker component to remove a specified slave device from loc...

CVE-2026-51768

CVE-2026-51768 is an incorrect access control vulnerability in the setElinkQosConfig function of the TOTOLINK T6 router (firmware 4.1.5cu.748_B20211015). An unauthenticated attacker with network access can send a crafted MQTT message to the cs_broker component to modify the privileged QoS policy ...

CVE-2026-51750

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...

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...

CVE-2026-51761

An incorrect access control flaw in the updateLanIp function of the TOTOLINK T6 router (version 4.1.5cu.748_B20211015) allows unauthenticated attackers to refresh the LAN address state by sending a crafted MQTT message to the cs_broker component. The CVSS 3.1 score is 5.3 (Medium) with Low integr...

CVE-2026-51760

TOTOLINK T6 routers running firmware 4.1.5cu.748_B20211015 contain an incorrect access control flaw in the informSyncUpgfw function, mediated through the cs_broker MQTT component. An unauthenticated network attacker can send a crafted MQTT message to mass-trigger firmware update activity across a...

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...

CVE-2026-51761

Incorrect access control in the updateLanIp function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to refresh the LAN address state via sending a crafted MQTT message to the csbroker component...

CVE-2026-51741

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...

EUVD-2026-69211

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...

EUVD-2026-69210

Incorrect access control in the guestwifisync function of TOTOLINK T6 4.1.5cu.748B20211015 allows unauthenticated attackers to disable guest virtual AP interfaces via sending a crafted MQTT message to the csbroker component...