Is CVE-2026-9384 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-9384 being exploited in the wild.

How severe is CVE-2026-9384?

Critical severity, with a CVSS score of 9.8, published 24 May 2026.

Which products and versions are affected?

TOTOLINK A8000RU 7.1cu.643_b20200521.

Is there a fix for CVE-2026-9384?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-9384 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-9384?

Check whether you run TOTOLINK A8000RU at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-9384: Totolink A8000RU OS command injection in setDiagnosisCfg

CVE-2026-9384 · Severity: critical · CVSS 9.8 · Published 2026-05-24

A vulnerability exists in the Totolink A8000RU wireless router, a device used to provide internet connectivity and local networking. An attacker can remotely take full control of the router by sending a specially crafted request to its web management interface. This could lead to the interception of network traffic, unauthorized access to the local network, or a complete disruption of internet services.

Technologies: TOTOLINK A8000RU. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-9384 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-9384 being exploited in the wild.
How severe is CVE-2026-9384?: Critical severity, with a CVSS score of 9.8, published 24 May 2026.
Which products and versions are affected?: TOTOLINK A8000RU 7.1cu.643_b20200521.
Is there a fix for CVE-2026-9384?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-9384 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-9384?: Check whether you run TOTOLINK A8000RU at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An OS command injection vulnerability exists in the Totolink A8000RU router (firmware version 7.1cu.643_b20200521) within the 'setDiagnosisCfg' function of the '/cgi-bin/cstecgi.cgi' component. The vulnerability is located in the 'sub_423CC8' function, which fails to properly sanitize the 'ip' parameter before passing it to 'snprintf' and subsequently executing it via 'execv()' through the 'CsteSystem' function. A remote, unauthenticated attacker can exploit this by sending a crafted JSON POST request containing shell metacharacters (e.g., backticks) in the 'ip' field. Successful exploitation allows for arbitrary command execution with the privileges of the web server. A public proof-of-concept (PoC) demonstrating the creation of a file via command injection is available.

Affected products

Totolink A8000RU 7.1cu.643_b20200521

Timeline

2026-05-24: disclosed: Initial disclosure and NVD publication

References

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