Medusa ransomware gang has hit over 500 organizations, CISA warns

The Medusa ransomware gang has compromised over 500 organizations across multiple critical infrastructure sectors using an affiliate model and rapid exploitation of public vulnerabilities, with agencies urging improved patching, network segmentation, and incident reporting.

This Wire brief sits within Fusion42's coverage of Cybersecurity, and 6 sources have reported it between 18 Aug 2026 and 19 Aug 2026.