CVE-2025-22225—VMware ESXi Arbitrary Write Vulnerability

Vulnerability Name

VMware ESXi Arbitrary Write Vulnerability

Description

VMware ESXi contains an arbitrary write vulnerability. Successful exploitation allows an attacker with privileges within the VMX process to trigger an arbitrary kernel write leading to an escape of the sandbox.

Known To Be Used in Ransomware Campaigns?

Ransomware Status:

KNOWN

Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Additional Notes

• https://support.broadcom.com/web/ecx/support-content-notification/-/external/content/SecurityAdvisories/0/25390
• https://nvd.nist.gov/vuln/detail/CVE-2025-22225

Related News Articles

• CISA confirms exploitation of VMware ESXi flaw by ransomware attackersFebruary 5, 2026
• CISA: VMware ESXi flaw now exploited in ransomware attacksFebruary 4, 2026
• CISA says critical VMware RCE flaw now actively exploitedJanuary 26, 2026
• China-Linked Hackers Exploit VMware ESXi Zero-Days to Escape Virtual MachinesJanuary 9, 2026
• VMware ESXi zero-days likely exploited a year before disclosureJanuary 8, 2026

Related Weaknesses

• CWE-123