CVE-2026-7538 CRITICAL

CVE-2026-7538: Totolink A8000RU CGI cstecgi.cgi vulnerability os command injection

Vendor Totolink
Product A8000RU
Weakness CWE-78
Published May 1, 2026
Last update May 1, 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 issue affects the function Vulnerability of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument proto leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.

Key dates

02Disclosure timeline

May 1, 2026 CVE published
May 1, 2026 Record updated