CVE-2026-9458: Totolink A8000RU Web Management cstecgi.cgi setWanCfg os command injection

Published May 25, 2026

Updated

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument enabled leads to os command injection. The attack may be performed from remote. The exploit is publicly available and might be used.

Affected Software

1 affected component

TOTOLINK A8000RU=7.1cu.643_b20200521

Event History

May 25, 2026

CVE Published

via MITRE·12:30 PM

Data Sourced

via MITRE·12:30 PM

DescriptionSeverityWeakness

Frequently Asked Questions

What is the severity of CVE-2026-9458?

CVE-2026-9458 has a critical severity rating of 9.8.

What type of vulnerability is CVE-2026-9458?

CVE-2026-9458 is categorized as an OS Command Injection vulnerability.

How do I fix CVE-2026-9458?

To fix CVE-2026-9458, update the Totolink A8000RU to the latest firmware version that addresses this issue.

What can attackers do with CVE-2026-9458?

Attackers can exploit CVE-2026-9458 to execute arbitrary operating system commands on the affected device.

Which component is affected by CVE-2026-9458?

CVE-2026-9458 affects the Web Management Interface of the Totolink A8000RU device.

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