A buffer overflow vulnerability (CVE-2026-6631) was discovered in Tenda F451 router firmware version 1.0.0.7_cn_svn7958. The vulnerability affects the fromwebExcptypemanFilter function in the /goform/webExcptypemanFilter file of the httpd component. An attacker can exploit this by manipulating the 'page' argument parameter. The vulnerability can be exploited remotely and public exploits are available, making it a high-risk security issue for affected Tenda router users.