Executive brief
A security vulnerability exists in the Edimax BR-6428NS wireless router, a device used to provide internet connectivity for homes and small offices. An attacker can exploit this flaw to crash the device or potentially take full control of it by sending a specially crafted web request. This could lead to a complete loss of internet service or unauthorized access to the network traffic passing through the router.
Technical details
A stack-based buffer overflow vulnerability exists in the Edimax BR-6428NS router version 1.10. The flaw is located within the 'formWanTcpipSetup' function in the '/goform/formWanTcpipSetup' component, which handles POST requests for WAN configuration. By manipulating the 'pppUserName' argument with an overly long string, a remote attacker with low privileges can trigger a memory corruption. This can result in arbitrary code execution or a denial of service (system crash). While the vendor was notified, no patch has been released, and public exploit code is reportedly available.
Affected products
- Edimax BR-6428NS 1.10
Timeline
- 2026-05-23: advisory: Initial disclosure by VulDB and NVD
- 2026-05-23: disclosed: Public exploit code made available