CVE-2026-9404 CRITICAL

CVE-2026-9404: Totolink A8000RU Web Management cstecgi.cgi setDdnsCfg os command injection

Vendor Totolink
Product A8000RU
Weakness CWE-78
Published May 24, 2026
Last update May 29, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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 command injection. The attack may be launched remotely. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

May 24, 2026 CVE published
May 29, 2026 Record updated