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About | QTNKSR

https://quentinkaiser.be/about/

... software, and traditional bug bounty hunting. You can get in touch by email (contact@ quentinkaiser.be) or ...

Disclaimer | QTNKSR

https://quentinkaiser.be/disclaimer/

I build things … and break others.

One Parser, Two Bugs, Many Routers: Exploiting Broadcom WiFi Across eCos and Linux | QTNKSR

16 Oct 2026

https://quentinkaiser.be/security/2026/10/16/one-parser-two-bugs/

A vulnerability in Broadcom’s proprietary WPS implementation enables unauthenticated attackers within WiFi range to leak memory and achieve unauthenticated remote code execution on millions of routers. This post covers its discovery through agentic vulnerability research, exploitation across eCos and Linux platforms, its impact on the global router supply chain, and a disclosure process rather … interesting.

AI Assisted Vulnerability Research on Embedded Targets | QTNKSR

18 Jul 2026

https://quentinkaiser.be/security/2026/07/18/ia-assisted-vuln-research/

I gave an AI agent access to a cable modem, a serial console, Ghidra, and a custom GDB stub, then asked it to reverse the firmware and hunt for bugs. It re-discovered known vulnerabilities, found new ones, and wrote working exploits. This post covers the setup, what it managed to do on its own, and where I still had to step in. The real problem is that the same approach now works on millions of devices nobody plans to fix.

Rooting the TP-Link Tapo C200 Rev.5 | QTNKSR

25 Jul 2025

https://quentinkaiser.be/security/2025/07/25/rooting-tapo-c200/

Let’s explore ways to mod a Tapo C200 Rev.5 firmware in order to gain root access to a running device.

So Many Ways to Own Dell EMC Networker | QTNKSR

12 Jun 2021

https://quentinkaiser.be/security/2021/06/12/emc-networker-rce/

Today we release multiple vulnerabilities affecting Dell EMC Networker to the public. These issues can be exploited as an unauthenticated user in order to gain arbitrary file read or remote command execution.

A Clockwork Orange - Remotely Compromising Orange Belgium Cable Modems | QTNKSR

25 Apr 2021

https://quentinkaiser.be/security/2021/04/25/orange/

This report outlines vulnerabilities found in Askey TCG300 cable modems provided by Orange Belgium to its subscribers. The modems are vulnerable to authenticated and unauthenticated remote code execution through the web administration server. These vulnerabilities arise from memory corruptions due to insecure function calls when handling HTTP requests. By exploiting these vulnerabilities, an attacker can gain unauthorized access to Orange Belgium customers LAN, fully compromise the router, and l...

Dell EMC Networker - oldauth is not auth ! | QTNKSR

11 Mar 2021

https://quentinkaiser.be/security/2021/03/11/emc-networker-oldauth-is-not-auth/

In this article, we’ll cover the different authentication mechanisms implemented by Networker (oldauth and nsrauth) and explain in details why relying on oldauth is the worst decision you can make when deploying Dell EMC Networker.

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