Executive brief
A security vulnerability exists in the TRENDnet TEW-432BRP wireless router, a device used to provide internet connectivity in home and small office environments. An attacker can exploit this flaw to crash the router or potentially take full control of the device by sending a specially crafted web request. Because this product reached its end-of-life in 2009, the manufacturer will not be providing any security updates or fixes.
Technical details
A stack-based buffer overflow vulnerability exists in the 'boa' binary of the TRENDnet TEW-432BRP router, specifically within the 'formSysLog' function handled via the '/goform/formSysLog' endpoint. The vulnerability is triggered by a lack of bounds checking on the 'current_page' (or 'webpage' as noted in PoC) parameter, which is copied directly into a local stack variable. A remote attacker with low privileges (authenticated access) can exploit this by sending a POST request with an oversized string, leading to the overwriting of the function's return address. This can result in a persistent denial of service (device crash) or remote code execution. No patch is available as the device has been EOL since 2009.
Affected products
- TRENDnet TEW-432BRP 3.10B20
Timeline
- 2009: other: Product reached End-of-Life (EOL)
- 2026-05-31: disclosed: Vulnerability details and PoC published