oieh-router-checker

OIEH Router Checker A Windows program that checks with a single click whether your router is affected by the Chinese backdoor ENDLESSDOORS No installation required · No administrator rights required · No external data transmission What Is This? In August 2026, security firm VulnCheck discovered a...

CVE-2026-74233

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-ECQP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain...

CVE-2026-74232

Zbtlink L3V28 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmwa...

EUVD-2026-67000

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-ECQP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain...

CVE-2026-74233 Zbtlink MQWrt infosrvd Command Injection

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-ECQP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain...

CVE-2026-74233

CVE-2026-74233 affects multiple Zbtlink wireless devices running MQWrt firmware (e.g., WE1326, WE357, WE5926, WG108, and others) due to an unauthenticated command injection in the infosrvd service on UDP/9992 . The service's authentication is rendered ineffective by a hardcoded salt and an all-ze...

CVE-2026-74232 Zbtlink MQWrt yunmgrd Cloud C2 Implant

Zbtlink L3V28 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmwa...

EUVD-2026-66999

Zbtlink L3V28 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmwa...

CVE-2026-74232

Multiple Zbtlink , MoreQuick , and other router/AP models (e.g., AP522, AP7628, HC5661A, APG721B, HK300, MAP-N10) ship a backdoor C2 implant (yunmgrd) reachable over an unauthenticated cleartext UDP channel to a hardcoded C2 server . A remote unauthenticated attacker on the network path can hijac...

VulnCheck KEV: CVE-2026-74232

Zbtlink L3V28 firmware 3.0.0.4.528, Zbtlink WE826-T2 firmware 19.1101, Zbtlink ZBT-7628 firmware 1.0.0.2.007, Zbtlink ZBT-ZBT7621 firmware 1.0.0.3.001, MoreQuick MQAC-7620, MQAC-7620A, MQAP-7620, MQAP-7620A, and MQAP-7628 firmware 1.0.0.2.000, AP522 firmware 1.0.0.2.014, AP7628 and HC5661A firmwa...

VulnCheck KEV: CVE-2026-74233

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-ECQP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain...

PT-2026-82487

Name of the Vulnerable Software and Affected Versions Zbtlink WE1326 firmware 19.1101 Zbtlink WE357 firmware 19.1101 Zbtlink WE5926 firmware 19.1101 Zbtlink WE5926-WD firmware 19.1101 Zbtlink WE826-Q firmware 19.1101 Zbtlink WE826-T2 firmware 19.1101 Zbtlink WE826-WD firmware 19.1101 Zbtlink WG10...

PT-2026-82486

Name of the Vulnerable Software and Affected Versions Zbtlink L3 V2 8 version 3.0.0.4.528 Zbtlink WE826-T2 version 19.1101 Zbtlink ZBT-7628 version 1.0.0.2.007 Zbtlink ZBT-ZBT7621 version 1.0.0.3.001 MoreQuick MQAC-7620 version 1.0.0.2.000 MoreQuick MQAC-7620A version 1.0.0.2.000 MoreQuick...

Exploit for CVE-2026-66747

OIEH Router Checker 내 공유기가 중국산 백도어ENDLESSDOORS에 해당하는지 클릭...

Chinese-Made Zbtlink Routers Ship With Backdoor That Opens Unauthenticated Root Shells

Cybersecurity researchers have disclosed details of a "factory-shipped backdoor" implanted in at least 20 Chinese router models from Zbtlink. According to a new report from VulnCheck, the implant appears in all 21 firmware images currently available from Zbtlink that span more than 2 years. The...

CVE-2026-66747

Zbtlink router firmware ships an embedded remote-control implant, ENDLESSDOORS, present in every published build across the product line. It is the open-source ycsunjane/rctl tool built in as an OpenWrt package librctl.so, started at boot and run as root under the process name kworker to blend in...

CVE-2026-66747

Zbtlink router firmware ships an embedded remote-control implant, ENDLESSDOORS, present in every published build across the product line. It is the open-source ycsunjane/rctl tool built in as an OpenWrt package librctl.so, started at boot and run as root under the process name kworker to blend in...

CVE-2026-66747 ENDLESSDOORS: Zbtlink Router rctl/kworker Phone-Home Root Implant

Zbtlink router firmware ships an embedded remote-control implant, ENDLESSDOORS, present in every published build across the product line. It is the open-source ycsunjane/rctl tool built in as an OpenWrt package librctl.so, started at boot and run as root under the process name kworker to blend in...

CVE-2026-66747

The CVE describes a firmware implant in Zbtlink router firmware (ENDLESSDOORS) embedded as an OpenWrt package (librctl.so) that runs at boot as root under kworker. It does not listen for connections but phones home over cleartext TCP to a hardcoded C2 address on channels 7000/7001, with no authen...