CVE-2020-6881: ZTE Zxhn e8810 Firmware

High severity, CVSS 7.5. EPSS: 0.6% chance of exploitation in the next 30 days.

ZTE E8810/E8820/E8822 series routers have an MQTT DoS vulnerability, which is caused by the failure of the device to verify the validity of abnormal messages. A remote attacker could connect to the MQTT server and send an MQTT exception message to the specified device, which will cause the device to deny service. This affects:<ZXHN E8810, ZXHN E8820, ZXHN E8822><E8810 V1.0.26, E8810 V2.0.1, E8820 V1.1.3L, E8820 V2.0.13, E8822 V2.0.13>

Affected products

• ZTE Zxhn e8810 Firmware: version 1.0.26 only; version 2.0.1 only
• ZTE Zxhn e8820 Firmware: version 1.1.3 only; version 2.0.13 only
• ZTE Zxhn e8822 Firmware: version 2.0.13 only

Published 2020-12-21. Last modified 2026-06-17.