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CISA Confirms Active Exploitation of VMware ESXi CVE-2025-22225

CISA Confirms Active Exploitation of VMware ESXi CVE-2025-22225

First seen 5 Feb 2026, 11:54 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

CISA has confirmed the active exploitation of a critical vulnerability in VMware ESXi, tracked as CVE-2025-22225. This zero-day flaw allows attackers to escape security sandboxes and is currently being used in ransomware operations. The vulnerability, classified as an arbitrary write memory issue, was added to CISA's Known Exploited Vulnerabilities catalog on March 4, 2025.

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