This stack-based buffer overflow affects the WrlclientSet function in Tenda FH451 routers. Remote attackers can trigger the flaw by manipulating the GO argument in requests to the affected endpoint. Successful exploitation allows for remote code execution or denial of service on the affected device.
Remediation
Discontinue use of the affected Tenda FH451 device and replace it with a currently supported router from a reputable vendor. Block all external access to the device's web management interface to reduce attack surface. Regularly audit network traffic connected to the device for any unauthorized activity.
Exploit info
The exploit has been released to the public (for example, see https://app.opencve.io/cve/CVE-2026-4535 or https://vuldb.com/). | Potential exploit details can be searched in Exploit-DB or GitHub: https://www.exploit-db.com/search?cve=CVE-2026-4535 | https://github.com/search?q=CVE-2026-4535+exploit
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