CISA Warns Medusa Ransomware Hackers Steal Data, Kill Security Tools, and Encrypt Entire Networks

Cybersecuritynews •Guru Baran • August 18, 2026

The Cybersecurity and Infrastructure Security Agency (CISA), the Federal Bureau of Investigation (FBI), and the U.S. Department of Health and Human Services (HHS) have jointly released an updated security advisory warning that Medusa ransomware threat actors are actively infiltrating enterprise environments, disabling security tools, exfiltrating sensitive files, and encrypting entire networks. The updated alert (AA25-071A) […]

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This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Ransomware Fuels Surge in Global Cyberattacks As of February 12, 2026, organizations worldwide are experiencing an average of 2,090 cyber-attacks per week, largely driven by ransomware incidents. This increase highlights the ongoing challenges faced by businesses in securing their networks against evolving cyber threats. 1922 sources 64

Extracted Entities

CISA Warns Medusa Ransomware Hackers Steal Data, Kill Security Tools, and Encrypt Entire Networks

The full story

Extracted Entities

Attack Types (1)

MITRE ATT&CK (3)

Ransomware Groups (1)