GoKawiil(˃ 𖥦 ˂) wowie ! don'tcha just miss them old school marquees? (˶˃ ᵕ ˂˶) .ᐟ.ᐟ
The rooting, firmware analysis and hardcoded, reset-persistent credentials of the TP-Link TL-841N!
2 Aug 2026
Now, let me just preface this with a disclaimer:
… and get used to this puppo, as you may see this a few more times in this post :’).
In light of continuing my bumbling foray into the hardware hacking landscape, I bought a bottom-of-the-line $10 TP-Link TL-841N(EU) router off a random fellow on Facebook Marketplace, in a thrilling, high-stakes deal conducted in the middle of… a nearby mall.
My intention behind such a daring exchange was to practice the end-to-end process of pulling apart an IoT device to poke at it, access debug logs, potentially get a root shell, practice various kinds of firmware extraction (via UART & via on-chip flash memory), and even have a mosey about the filesystem for some potential security vulnerabilities later down the road.
Here’s a short overview of the journey so far, documented below:
1. Cracking it open: Finding the UART & getting connected 2. Dumping the firmware ( Method 1. - UART & tftp ) 3. Dumping the firmware ( Method 2. - on-chip flashrom chip extraction ) 4. Un-squashing the root filesystem 5. Having a Look-see - Preliminary Snooping/Analysis
Hang around until the end for discovering what kinds of various plaintext, hardcoded creds from the previous owner (censored) could be found on this device… one of which would survive even a full “router reset”.
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