CVE intelligence and bounded remediation

CVE-2020-6881 — Zte Zxhn E8810 Firmware security vulnerability

High CVSS 7.5

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>

Severity
High
CVSS
7.5 (3.1)
Published
2020-12-21
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-346

Affected products

  • zte / zxhn_e8810_firmware / 1.0.26
  • zte / zxhn_e8810_firmware / 2.0.1
  • zte / zxhn_e8820_firmware / 1.1.3
  • zte / zxhn_e8820_firmware / 2.0.13
  • zte / zxhn_e8822_firmware / 2.0.13

Matched remediation archetype

General vulnerability remediation

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Check exposure

  • Confirm the affected component, deployment paths, reachable interfaces, and enabled features from inventories and configuration, without probing production destructively.
  • Compare the advisory's affected conditions with the repository lockfiles, build manifests, artifacts, and runtime inventory.
  • Identify data sensitivity, trust boundaries, and privilege level for every confirmed affected deployment.

Remediate safely

  • Apply a vendor-supported fix or remove the affected component or feature; record the selected change and its source in the repository.
  • Update direct and transitive dependency locks, generated artifacts, deployment manifests, and asset inventories together.
  • Add a regression test for the documented unsafe condition using inert inputs and preserve rollback instructions.

Authoritative sources

Complete CVE record and remediation plan

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