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Wire · technology

CISA: Medusa ransomware hit over 500 critical infrastructure orgs

19 August 2026 · By · Wire by Fusion42

Published

19 August 2026

Topic

technology

◆ Sectors

Cybersecurity

◆ Geography

United States

◆ Source

Read at bleepingcomputer.com →

◆ Verified

Fusion42 · 19 August 2026 · Fusion42 review

CISA reports that the Medusa ransomware has impacted over 500 critical infrastructure organisations, highlighting widespread vulnerability and risk in vital systems.

This Wire brief sits within Fusion42's coverage of Cybersecurity, and 2 sources have reported it between 18 Aug 2026 and 19 Aug 2026.

◆ ◆ The Wire takeaway

The assault on over 500 critical US infrastructure targets exposes urgent risk for service providers and security firms. You must act now to harden defences or lose vital contracts.

◆ Coverage

2 sources · first reported 18 Aug 2026 · latest 19 Aug 2026

◆ Related on Wire

◆ Topics

Cybersecurityransomwarecritical-infrastructurecybersecurityCISAMedusa