CVE-2026-9435 CRITICAL

CVE-2026-9435: Totolink A8000RU Web Management cstecgi.cgi setQosCfg os command injection

Vendor Totolink
Product A8000RU
Weakness CWE-78
Published May 25, 2026
Last update May 26, 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 detected in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setQosCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument enable results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used.

Key dates

02Disclosure timeline

May 25, 2026 CVE published
May 26, 2026 Record updated