Executive brief
The UTT HiPER 1250GW is a network router used to manage internet connectivity and network traffic in enterprise and small business environments. A critical vulnerability in its web-based configuration interface allows remote attackers to send a specially crafted request with an oversized parameter, causing the router to crash or potentially execute arbitrary code. This could result in network unavailability, data loss, or unauthorized access to network management functions.
Technical details
The vulnerability is a stack-based buffer overflow in the /goform/getOneApConfTempEntry endpoint, triggered by the tempName parameter passed to an unsafe strcpy() function. The vulnerable code does not validate the length of user-supplied input before copying it into a fixed-size stack buffer, allowing an attacker to overflow the buffer with arbitrary data. An attacker with network access to the router's web interface (typically requiring authentication via Digest auth, though the advisory indicates remote exploitation) can trigger a denial of service by crashing the device, or potentially achieve code execution by carefully crafting a payload with a return address. A public exploit is available and the vendor has not responded to disclosure attempts.
Affected products
- UTT HiPER 1250GW up to v3.2.7-210907-180535
Timeline
- 2026-08-05: disclosed: Vulnerability published on NVD
- 2026-08-05: other: Vendor was contacted early but did not respond