CVE-2026-9457: Totolink A8000RU Web Management cstecgi.cgi UploadFirmwareFile os command injection

Published May 25, 2026

Updated

A vulnerability was determined in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument FileName causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized.

Affected Software

1 affected component

TOTOLINK A8000RU=7.1cu.643_b20200521

Event History

May 25, 2026

CVE Published

via MITRE·12:15 PM

Data Sourced

via MITRE·12:15 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-9457?

CVE-2026-9457 has a critical severity rating of 9.8.

How does CVE-2026-9457 affect the Totolink A8000RU?

CVE-2026-9457 allows for OS command injection through the UploadFirmwareFile function in the web management interface.

What are the potential impacts of exploiting CVE-2026-9457?

Exploitation of CVE-2026-9457 can lead to unauthorized command execution on the affected device.

How can I mitigate CVE-2026-9457?

To mitigate CVE-2026-9457, it is recommended to apply patches or updates provided by the manufacturer.

Is there a known fix for CVE-2026-9457?

As of now, there are no specific details on a permanent fix available for CVE-2026-9457.

Company

Resources

Contact

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