What is CVE-2026-9404?

CVE-2026-9404 is a critical-severity vulnerability in Totolink A8000ru, classified under Command Injection. CVSS score: 9.8/10. Published 2026-05-24.

How severe is CVE-2026-9404?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in Totolink A8000ru

CVE-2026-9404

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument provider leads to os…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.013 (79.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink A8000ru — versions 7.1cu.643_b20200521

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, vdb-entry)
cna@vuldb.com (signature, permissions-required)
cna@vuldb.com (third-party-advisory)
cna@vuldb.com (exploit)
cna@vuldb.com (product)

Frequently asked questions

What is CVE-2026-9404?: CVE-2026-9404 is a critical-severity vulnerability in Totolink A8000ru, classified under Command Injection. CVSS score: 9.8/10. Published 2026-05-24.
How severe is CVE-2026-9404?: Critical severity. CVSS v3 base score is 9.8 out of 10.