CVE-2026-7243 CRITICAL

CVE-2026-7243: Totolink A8000RU CGI cstecgi.cgi setRadvdCfg os command injection

Vendor Totolink
Product A8000RU
Weakness CWE-78
Published April 28, 2026
Last update April 28, 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. The affected element is the function setRadvdCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument maxRtrAdvInterval leads to os command injection. It is possible to initiate the attack remotely. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

April 28, 2026 CVE published
April 28, 2026 Record updated