Critical · published December 30, 2025
🚨 A stack-based buffer overflow in the GoAhead-Webs HTTP daemon could let an attacker take control of your KuWFi 4G LTE AC900 devices! 🔥 Think of it like a crowded restaurant where a waiter keeps piling plates on a small table — eventually, it tips over and crashes, causing a big mess. This vulnerability works similarly by allowing data to overflow past its limits, corrupting adjacent memory and potentially crashing the server. An attacker could exploit this flaw to crash the web server, leading to a denial of service. In worse scenarios, they might execute arbitrary code, effectively taking control of the device and making it possible to perform malicious actions. The consequences could be absolutely devastating for users and networks alike!
Think of it like a crowded restaurant where a waiter keeps piling plates on a small table — eventually, it tips over and crashes, causing a big mess. This vulnerability works similarly by allowing data to overflow past its limits, corrupting adjacent memory and potentially crashing the server. This vulnerability arises from the use of sprintf() in handling the pincode parameter, which allows for a buffer overflow when the input exceeds 132 bytes without proper bounds checking. This critical oversight opens the door for memory corruption and impacts server stability.
An attacker could exploit this flaw to crash the web server, leading to a denial of service. In worse scenarios, they might execute arbitrary code, effectively taking control of the device and making it possible to perform malicious actions. The consequences could be absolutely devastating for users and networks alike! To protect your devices, immediately patch the firmware to the latest version where this issue has been resolved. Additionally, avoid user-supplied input in sensitive functions without validation and implement stricter input checks to prevent buffer overflows. You've got this! With a few updates and good practices, you can secure your devices and keep your network safe! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| kuwfi/ac900_firmware | all versions | — |