CVE-2026-9475: Totolink A8000RU Web Management cstecgi.cgi setIpQosRules os command injection
A vulnerability was determined in Totolink A8000RU 7.1cu.643b20200521. This affects the function setIpQosRules of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. This manipulation of the argument Comment causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Configuration
Disable remote web management access for the Totolink A8000RU or restrict web management to only trusted/internal IP addresses to prevent remote exploitation of the cstecgi.cgi setIpQosRules function.
Totolink A8000RU Web Management Interface (/cgi-bin/cstecgi.cgi) remote_management = disabled or restricted to trusted IPs - Compensating control
Block or filter requests to /cgi-bin/cstecgi.cgi (and specifically the setIpQosRules entry) at the network perimeter (firewall, router ACL, or WAF). Restrict access to the device management interface to trusted networks only and deny access from the public Internet.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-9475?
CVE-2026-9475 has a severity rating of critical with a score of 9.8.
How do I fix CVE-2026-9475?
To mitigate CVE-2026-9475, it is recommended to update the firmware of the Totolink A8000RU router to the latest version.
What type of vulnerability is CVE-2026-9475?
CVE-2026-9475 is classified as an OS command injection vulnerability.
What software is affected by CVE-2026-9475?
CVE-2026-9475 affects the Totolink A8000RU hardware running version 7.1cu.643_b20200521.
Can CVE-2026-9475 be exploited remotely?
Yes, CVE-2026-9475 can be exploited remotely, allowing attackers to execute arbitrary commands on the affected system.