Is CVE-2026-7204 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-7204 being exploited in the wild.

How severe is CVE-2026-7204?

Critical severity, with a CVSS score of 9.8, published 28 April 2026.

Which products and versions are affected?

TOTOLINK A8000RU 7.1cu.643_b20200521.

Is there a fix for CVE-2026-7204?

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-2026-7204 attacked?

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

Am I affected by CVE-2026-7204?

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-2026-7204: Totolink A8000RU command injection in setPptpServerCfg

CVE-2026-7204 · Severity: critical · CVSS 9.8 · Published 2026-04-28

A security vulnerability has been identified in the Totolink A8000RU wireless router. This flaw allows an attacker to remotely take control of the device by sending a specially crafted request to the router's management interface. Successful exploitation could lead to a complete compromise of the network traffic passing through the device, unauthorized access to internal data, or a total disruption of internet services.

Technologies: TOTOLINK A8000RU. Vendors: TOTOLINK.

Quick answers

Is CVE-2026-7204 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-7204 being exploited in the wild.
How severe is CVE-2026-7204?: Critical severity, with a CVSS score of 9.8, published 28 April 2026.
Which products and versions are affected?: TOTOLINK A8000RU 7.1cu.643_b20200521.
Is there a fix for CVE-2026-7204?: 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-2026-7204 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-7204?: 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. The flaw is located within the 'setPptpServerCfg' function in '/cgi-bin/cstecgi.cgi'. The root cause is the improper neutralization of the 'enable' argument, which is passed to the 'Uci_Set_Str' function and subsequently executed via 'execv()' through the 'CsteSystem' function in 'libcscommon.so'. A remote, unauthenticated attacker can exploit this by sending a crafted POST request containing shell metacharacters (e.g., backticks or semicolons) in the JSON payload. This allows for arbitrary command execution on the underlying Linux operating system with high privileges. A public PoC demonstrating the creation of a file via the 'ls' command has been disclosed.

Affected products

Totolink A8000RU 7.1cu.643_b20200521

Timeline

2026-04-28: disclosed: Vulnerability details and PoC publicly released.
2026-04-28: advisory: CVE-2026-7204 published.

References

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