This is an unauthenticated OS command injection vulnerability in the CGI handler of Totolink A7100RU wireless routers. The flaw exists in the setIpQosRules function, where a crafted Comment argument allows attackers to inject arbitrary system commands. The exploit has been publicly disclosed and can be exploited remotely.
Remediation
No official patch is available for this end-of-life router model from Totolink. Organizations using affected devices should replace them with supported, updated hardware. If replacement is not immediate, restrict all external access to the device's management interface.
Exploit info
The exploit has been released to the public; public references are available at https://app.opencve.io/cve/CVE-2026-6156 or https://vulners.com/cve/CVE-2026-6156. Potential exploit details can be searched in Exploit-DB or GitHub: https://www.exploit-db.com/search?cve=CVE-2026-6156 | https://github.com/search?q=CVE-2026-6156+exploit
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