IMPORTANTThis article was translated into English by ChatGPT and may contain errors. For the most accurate and complete experience, please refer to the original Chinese version.
Challenge TeaGod666(100)
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## TeaGod Router TeaGod666: Security Is Not a Feature, but a Belief 👍
In an age when Wi-Fi passwords are more complicated than life plans and routers demand firmware updates every three days, TeaGod Technology officially introduces its revolutionary product: the **TeaGod666 Super-Secure Smart Router**.
It is more than just a router; it is a digital Tea God protecting your online world around the clock. While other vendors are still talking about WPA3, firewalls, and zero-trust architecture, TeaGod666 has already pioneered the industry's first "**mysticism-grade cybersecurity protection technology**": as long as you believe it is secure, it will become secure.
## Core Security Technology
TeaGod666 features the latest-generation **TeaSecure™ 666-bit encryption protocol**. Compared with traditional 128-bit or 256-bit encryption, this product uses 666-bit encryption directly. The number is bigger, so it is theoretically more secure; this is a mathematical fact that no cybersecurity engineer can refute.
In addition, the built-in AI firewall can identify suspicious packets in real time:
- The packet looks suspicious: block it immediately- The packet does not look suspicious: let it through first to avoid blocking legitimate users by mistake- The packet is completely incomprehensible: send it to the cloud AI for analysis and temporarily place no restrictions on its behavior during the analysis- The attacker disguises their traffic as normal traffic: the system will respect their privacy and choices
We believe that true security is not about restrictions, but about understanding and acceptance.
## Login System: Simplicity Is Security
TeaGod666 uses a minimalist account and password design. The factory-default username is `admin`, and the password is also `admin`. This design reduces the chance of users forgetting their passwords and allows maintenance staff to log in quickly during any emergency.
Some people may question the risks of a default password, but rest assured: as long as no one tells hackers your IP address, they will not know where to start.
The admin interface is also available exclusively over HTTP, completely avoiding complicated problems such as expired HTTPS certificates and incompatible TLS versions. Without an encryption protocol, there can be no encryption-protocol vulnerabilities; TeaGod666 eliminates the TLS attack surface at its source.
## Remote Management
To let users manage their home networks anytime and anywhere, TeaGod666 enables remote WAN management by default and provides the convenient option of allowing logins from any source IP address.
Traditional routers require users to configure a VPN, allowlist, or multi-factor authentication first, creating unnecessary obstacles. TeaGod666 believes that **if even the router's owner cannot log in whenever they want, how can you call it a smart home?**
Even more thoughtfully, the system displays the complete model number, firmware version, and management port on the login page, allowing both security researchers and potential users to learn about the product quickly.
## Firmware Update Strategy
TeaGod666 follows a "stability first" update philosophy. Because new versions may introduce new bugs, our firmware has not received any major updates since 2017, successfully avoiding a large number of future vulnerabilities.
All firmware files use the `.bin` extension, allowing professional users to conveniently download, upload, and install them from any website. The system will not interfere excessively with the source of a file or annoy you with signature checks; after all, trust is the most important protocol on the Internet.
## TeaCloud Cloud Security Center
TeaGod666 uploads Wi-Fi SSIDs, connected-device names, MAC addresses, DNS query logs, and portions of network traffic to TeaCloud, allowing the AI to keep learning how to protect you.
We do not collect personal data; we merely collect data that is "related to individuals but may not necessarily identify them directly."
Data travels through nodes around the world, ensuring that wherever you are, a server whose owner you do not know is always working hard to protect you.
## Customer Testimonials
> "Ever since I switched to TeaGod666, my home network has never been hacked. At least, I have never been notified."> — Anonymous user
> "I used to read security advisories every day. Now I do not have to, because this router does not even have an update page."> — Senior network administrator
> "After opening the admin page on 0.0.0.0:80, I can finally manage my home Wi-Fi from school, cafés, friends' houses, and even strangers' computers. It is so convenient."> — Remote-work enthusiast
## Conclusion
TeaGod666's security philosophy is simple:
> **Just because you cannot see a vulnerability does not mean it is not there; but as long as you never update, scan, or read the logs, vulnerabilities do not exist in your world.**
The TeaGod Router: super secure and worthy of your trust 👍
*Note: This product's "666-bit encryption" is actually created by repeating the password several times. If TeaCloud is temporarily unavailable, the device will switch to public DNS to preserve a sense of mystery.*The content above was just random AI-generated nonsense and has nothing to do with the challenge. Just solve it already :D
Connection
Challenge Design Inspiration:
I also made this challenge as a tribute to the Tea God’s talk at SITCON 2026. You will see what that means in the Easter egg later.
For this challenge, I mainly gave my ideas to AI and asked it to help write the website and some of the copy. I specifically told it how the essential solution steps should work and be used; everything else was left up to the AI.
Solution:
This challenge is not very difficult. Here is the solution:
First, open the website. You will find an administrator login page, and the page’s source code reveals this pile of APIs:
- GET /api/session
- GET /api/router
- GET /api/update/check
- GET /api/update/package?channel=stable
- GET /api/system/logs?level=info
- POST /api/login
- POST /api/logout
- POST /api/wifi
- POST /api/reboot
The GET /api/update/package?channel=stable endpoint lets us retrieve a file without logging in, so we can download it.
The file is named teagod666-update.bin. Open it with HxD, and you will see this:
54454147 4F443636 01000B00 36004100 0000AC00 00006417 F2B430A5 BBD530C3 58566D42 30D094DA 2240EC0E F9BFAC35 076FC151 5B4D7465 6173686F 702D3636 36443063 4D484177 4B484138 4D464749 52424359 6344466C 47477851 61464145 57424145 47446831 49464177 55465145 4D47675A 4E584139 47563055 48456734 42444531 4B44316C 5A576873 4C426977 63436846 79414141 41566B6C 44485163 62465138 4D464841 56426855 6347685A 51586C4E 45514230 4742464D 4A44424E 43513168 43576B55 7A484277 4F424567 57563141 4141424E 54446759 43586B49 57564273 4B465631 4B45673D 3DIt looks like this when interpreted as text:
TEAGOD66� �6�A���¬���dò´0¥»Õ0ÃXVmB0ÐÚ"@ìù¿¬5oÁQ[Mteashop-666D0cMHAwKHA8MFGIRBCYcDFlGGxQaFAEWBAEGDh1IFAwUFQEMGgZNXA9GV0UHEg4BDE1KD1lZWhsLBiwcChFyAAAAVklDHQcbFQ8MFHAVBhUcGhZQXlNEQB0GBFMJDBNCQ1hCWkUzHBwOBEgWV1AAABNTDgYCXkIWVBsKFV1KEg==Some of the characters are messed up, but you will notice that part of it is readable plaintext:
teashop-666D0cMHAwKHA8MFGIRBCYcDFlGGxQaFAEWBAEGDh1IFAwUFQEMGgZNXA9GV0UHEg4BDE1KD1lZWhsLBiwcChFyAAAAVklDHQcbFQ8MFHAVBhUcGhZQXlNEQB0GBFMJDBNCQ1hCWkUzHBwOBEgWV1AAABNTDgYCXkIWVBsKFV1KEg==Then, being the clever person you are, you split this string into two parts:
teashop-666D0cMHAwKHA8MFGIRBCYcDFlGGxQaFAEWBAEGDh1IFAwUFQEMGgZNXA9GV0UHEg4BDE1KD1lZWhsLBiwcChFyAAAAVklDHQcbFQ8MFHAVBhUcGhZQXlNEQB0GBFMJDBNCQ1hCWkUzHBwOBEgWV1AAABNTDgYCXkIWVBsKFV1KEg==Then, decode the Base64 data and XOR it to get the result below (write a script to run it):
import base64import json
b64 = "D0cMHAwKHA8MFGIRBCYcDFlGGxQaFAEWBAEGDh1IFAwUFQEMGgZNXA9GV0UHEg4BDE1KD1lZWhsLBiwcChFyAAAAVklDHQcbFQ8MFHAVBhUcGhZQXlNEQB0GBFMJDBNCQ1hCWkUzHBwOBEgWV1AAABNTDgYCXkIWVBsKFV1KEg=="
key = b"teashop-666"
encrypted = base64.b64decode(b64)
decrypted = bytes( byte ^ key[index % len(key)] for index, byte in enumerate(encrypted))
data = json.loads(decrypted.decode("utf-8"))print(json.dumps(data, ensure_ascii=False, indent=2))After running it, you will get this:
➜ ~ py decode.py{ "model": "TeaGod666", "username": "admin", "password": "oolong_tea_666", "note": "Factory service account. Rotate after first boot."}➜ ~You can see the username and password here. Enter them into the panel to access the admin interface.
Remember the APIs we found earlier? One of them is - GET /api/system/logs?level=info, and it looks pretty suspicious. Sending a request to it returns this:
{ "service": "tea-leaf-telemetry", "level": "info", "entries": [ { "time": "2026-08-15T08:00:01+08:00", "level": "INFO", "event": "wan_link_up", "message": "WAN link established" }, { "time": "2026-08-15T08:00:03+08:00", "level": "INFO", "event": "dns_ready", "message": "DNS resolver ready: 1.1.1.1" }, { "time": "2026-08-15T08:01:12+08:00", "level": "INFO", "event": "wifi_client_joined", "message": "tea-kitchen joined TeaGod_5G" }, { "time": "2026-08-15T08:04:27+08:00", "level": "INFO", "event": "wifi_client_joined", "message": "bubble-phone joined TeaGod_5G" } ]}We can then guess that level might accept debug. You can refer to this image:
Image source
Sending a request with the debug parameter then reveals the credentials:
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{ "service": "tea-leaf-telemetry", "level": "info", "entries": [ { "time": "2026-08-15T08:00:01+08:00", "level": "INFO", "event": "wan_link_up", "message": "WAN link established" }, { "time": "2026-08-15T08:00:03+08:00", "level": "INFO", "event": "dns_ready", "message": "DNS resolver ready: 1.1.1.1" }, { "time": "2026-08-15T08:01:12+08:00", "level": "INFO", "event": "wifi_client_joined", "message": "tea-kitchen joined TeaGod_5G" }, { "time": "2026-08-15T08:04:27+08:00", "level": "INFO", "event": "wifi_client_joined", "message": "bubble-phone joined TeaGod_5G" }, { "time": "2026-08-15T08:04:27+08:15", "level": "DEBUG", "event": "factory_validation", "message": "maintenance note: THJCC{t3ag0d666_h77p5://y0u7u.b3/Dji_wUhFPvo?si=z1B9a-4nShzop-du&t=1577}" } ]}Flag:
THJCC{t3ag0d666_h77p5://y0u7u.b3/Dji_wUhFPvo?si=z1B9a-4nShzop-du&t=1577}
Easter Egg
This challenge pays tribute to a SITCON 2026 Lightning Talk by the Tea God (Lemon Tea), “That Time I Took Control of My School’s Wi-Fi in Less Than a Day.”
The Tea God found the firmware for their school’s AP, reverse-engineered the SQL credentials from it, and took control.
You will also notice that the Flag leads to the video “SITCON 2026 | Lightning Talk | R0.”
Anyway, that is basically what happened :D