We are pleased to announce that Internal Security Department (ISD) is sponsoring Summer Pwnables Challenge #0002 Challenge #003.

Distribution Rule

• Challenge #002 and #003 are meant for Singaporean students.
• Each Singaporean student can only win once across all challenges to ensure broader community recognition. However, they can still submit their solutions in order to win the new “Grand Prize”

Prizes are still $100 SGD + the “From Day Zero to Zero Day” book written by Eugene “Spaceraccoon” Lim for the first five solvers.

The Summer Pwnables Trilogy

Challenge #001 ✅ Submissions Closed but we are still accepting submissions if you want to try for the grand prize

• Creator: Zafir Rasyidi Taufik
• Status: All books & prizes claimed.
• Eligibility: Singapore-based students

• Creator: Muhammad Alifa Ramdhan
• Eligibility: Singaporean students only
• Link to Challenge: https://github.com/star-sg/challenges/blob/main/Aug%202025/readme_ramdhan.md

• Creator: Eugene “Spaceraccoon” Lim
• Eligibility: Singaporean students only
• Link to Challenge: https://github.com/star-sg/challenges/blob/main/Aug%202025/readme_Eugene.md

Eugene is also the author of “From Day Zero to Zero Day” and creator of the limited edition plushies.

New “Grand Prize”

Complete all three challenges in the fastest combined time for ultimate recognition.

Prize details: $512, $256, $128 SGD

Special Recognition Awards

Best Overall Writeup: Winner to be announced soon.

Special Addition: Limited Edition Collectibles

Limited Edition Eugene “Spaceraccoon” Lim Collectible Plushie 🧸

The first five finishers in each challenge will also receive this exclusive Spaceraccoon collectible.

Eligibility Requirements

Challenge #001 (Submissions Closed but we are still accepting submissions if you want to try for the grand prize)

• Singapore-based students
• Currently enrolled in Singapore educational institutions

• Singaporean students only
• Currently enrolled in Singapore educational institutions

ISD confronts and addresses threats to Singapore’s internal security and stability. For over 70 years, ISD and its predecessor organisations have played a central role in countering threats such as those posed by foreign subversive elements, spies, racial and religious extremists, and terrorists. At the heart of our work are the collection of intelligence that enables us to size up the threats to Singapore’s internal security, and taking the executive actions necessary to overcome those threats. Every day, we collect and analyse intelligence, make impartial assessments, and take decisive action to counter the threats to Singapore’s internal security and stability, and sovereignty.

Discover what it is like to work at ISD 👉 https://www.mha.gov.sg/isd/be-part-of-isd