Executive brief
Tenda HG10 is a wireless router used for home and small business networks. A buffer overflow vulnerability in the web-based administration interface allows a remote attacker to crash the device or potentially execute arbitrary code by sending a specially crafted HTTP request. This could render the network inaccessible and disrupt customer connectivity.
Technical details
A stack-based buffer overflow exists in the Boa web server's formWanRedirect function, triggered by improper validation of the 'if' parameter. The vulnerable code uses strcpy() to copy user-controlled input from an HTTP POST request into a fixed-size buffer without length checking. An attacker can send an oversized value for the 'if' parameter in a POST request to /boaform/formWanRedirect to overwrite adjacent stack memory. The attack requires no authentication and is remotely exploitable over the network. Confirmed impact includes denial of service (device crash); code execution may be possible depending on memory layout. No patch information is currently available.
Affected products
- Tenda HG10 300001138
Timeline
- 2026-09-06: disclosed