Totolink · A8000Ru · CVE-2026-9404
**Name of the Vulnerable Software and Affected Versions**
Totolink A8000RU version 7.1cu.643 b20200521
**Description**
An OS command injection issue exists in the Web Management Interface. This occurs when the `provider` argument is manipulated within the `setDdnsCfg()` function of the '/cgi-bin/cstecgi.cgi' endpoint. This flaw allows a remote attacker to execute arbitrary operating system commands.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
As a temporary workaround, restrict access to the '/cgi-bin/cstecgi.cgi' endpoint or disable the `setDdnsCfg()` function to minimize the risk of exploitation.