Risk Letters

Exploited vulnerability

CVE-2025-22225

TLP:CLEAR

VMware ESXi Arbitrary Write Vulnerability

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.

Facts

  • Vendor: VMware
  • Product: ESXi
  • CVSS: 8.2
  • EPSS (probability of exploitation within 30 days): 1 %
  • On CISA's Known Exploited Vulnerabilities list since: 4 March 2025
  • First known exploitation: 4 March 2025
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 25 March 2025
  • Weakness: CWE-123
  • First seen by Risk Letters: 4 March 2025

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD