Hey! I’m Gerr.re, breaker of trust chains ⛓, developer of exploits 💥, granter of access 🔑 and consumer of bananas 🍌 (in that order).

My aim is to responsibly disclose vulnerabilities by means of coordinated/private disclosure.

I mainly blog public/coordinated disclosures and other reversing endeavors.

Please feel free to reach out to me by DM on Twitter/Discord if you have any questions.

Flare-On 9: 09_encryptor

Flare-On is an annual single player reverse engineering CTF that represents the skills and challenges that the Mandiant FLARE team faces. The 8-12 challenges increase in difficulty and participants have about 6 weeks to complete them all in order to win a prize. ...

November 12, 2022 · 11 min · Gerr.re


Caphyon Ltd Advanced Installer 19.3 “CustomDetection” Update Check Remote Code Execution Vulnerability (PDF) ...

June 1, 2022 · 7 min · Gerr.re


EMCO Software Multiple Products Unauthenticated Update Remote Code Execution Vulnerability (PDF) ...

May 10, 2022 · 5 min · Gerr.re


ZZ Inc. KeyMouse 3.08 (Windows) Unauthenticated Update Remote Code Execution Vulnerability (PDF) ...

March 4, 2022 · 5 min · Gerr.re