Brute-forcing ButterflyMX Virtual Keys and Hacking Time Limits
Recently, I discovered two vulnerabilities in the ButterflyMX system which were responsibly disclosed to the vendor. The vendor has mitigated the highest-risk vulnerability, which enabled unauthorized attackers to gain access to buildings equipped with the ButterflyMX Access Control System by employing a brute-force technique, typically requiring only a few hundred attempts to successfully guess virtual keys.