Hi, I'm Nhat Duy

Offensive security engineer and CTF-er.

My avatar

About

I’m a Vietnamese security enthusiast who loves breaking things and sharing knowledge. I’m currently working as an Offensive Security Engineer at Calif and playing CTFs with KCSC and Project Sekai.

Work Experience

  • Calif

    Calif

    Offensive Security Engineer

    January 2026 - Present
  • VNG Corporation

    VNG Corporation

    Security Engineer

    April 2025 - January 2026
  • PC

    Private Company

    Red Team Engineer

    June 2023 - April 2025
  • Cyberjutsu

    Cyberjutsu

    Security Researcher Intern

    December 2022 - June 2023

Education

  • Academy of Cryptography Techniques

    Academy of Cryptography Techniques

    Bachelor of Information Security

    2021 - 2025

CVEs

Others: 20+ WordPress Plugins CVEs, CVE-2024-6035, CVE-2024-8400, CVE-2024-8020, CVE-2024-8099, Post-auth insecure deserialization in Zoho Applications Manager (ZVE-2025-0442) …

Awards & Recognition

  • 1P

    1st Place

    TetCTF

    2024
  • R

    Runner-up

    ASEAN Student Contest on Information Security (ASCIS)

    2024
  • TP

    Third Place

    ASEAN CyberShield

    2025
  • F

    Finalist

    CODEGATE CTF Final

    2025
  • AT

    Authoring Team

    Cybersecurity Student Contest Vietnam (CSCV)

    2025

Others: KMACTF 2024 - 2nd Place, ASCIS 2023 - 3rd Place, TetCTF 2023 - 3rd Place, ISITDTU Quals 2023 - 1st Place, ISITDTU Quals 2022 - 2nd Place …

Skills

  • Red Teaming
  • Web Pentest
  • Vulnerability Research