CVE-2026-9389

Tenda · F456

A security vulnerability has been identified in Tenda F456 routers, potentially exposing the device to unauthorized administrative control.

Executive summary

A critical security vulnerability in the Tenda F456 router may allow an attacker to gain unauthorized access or control over the device.

Vulnerability

The vulnerability relates to a security flaw in the firmware of the Tenda F456. While specific technical details are pending, such vulnerabilities in consumer-grade routers typically involve authentication bypass or command injection flaws.

Business impact

With a CVSS score of 8.8, the potential for full device compromise is significant. An attacker who gains control of the router can intercept traffic, perform man-in-the-middle attacks, and pivot into the internal network, causing severe risk to all connected endpoints.

Remediation

Immediate Action: Check the Tenda support website for firmware updates and apply them to all F456 devices immediately.

Proactive Monitoring: Monitor for unexpected traffic patterns or changes to device configuration settings that suggest unauthorized tampering.

Compensating Controls: Disable remote management features on the router and ensure that the administrative interface is not exposed to the public internet.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Network perimeter devices are high-value targets for attackers. Users of Tenda F456 hardware should prioritize the deployment of vendor-supplied patches to secure their local network gateway against potential remote exploitation.