Security Labs & CTF Platform

Espilon

Hardware · IoT · OT · RF · ESP32 · Web3

Permanent labs and challenges accessible 24/7,
and Espilon CTF editions leading to an on-site final.

THE WIRED — layer_07@espilon
NAVI OS v3.14 — Tachibana Labs
Connecting to The Wired ... OK
lain@wired:~/the_wired $ █
Access challenges → Create an account Discord
27
Challenges
—
Players
8
Categories
LIVE
Status
Getting started

How it works

01
Create your account

Free registration, no hardware required. Immediate access to all labs and challenges on the platform.

Register →
02
Explore labs & challenges

Permanent challenges and labs available 24/7. UART, BLE, RF, OT, ESP32 — progress at your own pace.

View challenges →
03
Join the community

Connect with the community on Discord. Upcoming CTF editions are announced there.

Join Discord →
The platform

Three levels of engagement

Permanent labs & challenges

Challenges and labs always accessible, no time limit. Progress at your own pace on ESP32, RF, PLCs, embedded firmware.

Available 24/7
Monthly challenges

Every month, new thematic challenges around hardware, IoT and OT. Active scoreboard, cumulative points.

New every month
Espilon CTF

Occasional competitive editions. The best teams qualify for a physical final with exclusive hardware challenges.

On-site final
Scoreboard

Hall of Fame

Full scoreboard →
Next event

Espilon CTF #2

Date TBA — On-site final

The second edition of Espilon CTF. Brand new hardware challenges, RF and OT events. The best teams on the scoreboard will qualify for the physical final.

Announcement coming soon on Discord
Follow the announcement Register now
Domains

What we break here

ESP32
Firmware, UART, Wi-Fi, mesh TCP/IP on ESP32
Hardware required
IoT
UART, BLE, Wi-Fi, MQTT, embedded firmware
OT / ICS
Modbus, BACnet, OPC-UA, EtherNet/IP, SCADA
Hardware
Side-channel, glitching, JTAG, SPI, I2C, CAN
Web3
Smart contracts, EVM reverse, fuzzing, DeFi
Misc
RF/SDR, steganography, web, multi-stage
Lab
Guided environments, API, OTA, technical demos
Intro
Platform onboarding, first flag
History

Past editions

2025
Espilon CTF #1
ESP32 IoT OT

First official Espilon CTF edition. ESP32, medical IoT and embedded Wi-Fi router challenges.

ESP Start / Jnoned Router / Advanced Infusion Pump
April 2026
Espilon Platform LIVE
Hardware IoT OT ESP32

Launch of the permanent platform. 39 challenges across 8 categories, 24/7 labs, active scoreboard. Next CTF edition announced on Discord.

39 challenges / 8 categories / Labs 24/7
Questions

FAQ

Everything you need to know before getting started.

All levels. The Intro category and Labs are designed for beginners. IoT/Hardware challenges are accessible with basic networking or embedded knowledge. OT, Web3 and progressive series (Phantom Byte, Jnouner Router) target advanced profiles.
Almost everything is accessible online — UART, BLE, RF, OT, Web3 are emulated or containerized. The ESP32 category is the exception: it requires a real physical ESP32 to flash the firmware and interact with real hardware.
Challenges that require a physical ESP32. We provide the binaries to flash. You then interact with the firmware via UART, Wi-Fi or TCP. The Jnouner Router and Phantom Byte series are 4-stage progressive chains.
Qualifications go through Espilon CTF editions, announced on Discord. The top teams on the final scoreboard receive an invitation to the physical final. Permanent labs and challenges let you train between editions.
Yes, everything is free. Registration takes less than a minute.
Permanent labs and challenges are accessible solo. For CTF editions, teams of 1 to 4 players can be formed. Join the Discord to find teammates.
Partners

Support Espilon

Espilon is an independent platform dedicated to hardware and IoT security research. We're looking for companies and organizations who share our passion for offensive security and want to support the next generation of researchers.

Contact us
Visibility

Logo on the platform, CTF challenge pages, and announcements to our community of security researchers.

Talent

Direct access to a community of skilled security researchers and hardware specialists through the CTF.

Custom challenges

Opportunity to propose challenges based on your technologies, products or research areas.

On-site presence

Presence at the on-site final: booth, hardware demos, direct contact with finalists.

Join the platform

Free · No hardware required · Active community

Create an account Discord