ClosedPatched

VMware ESXi: ESXi Arbitrary Write Vulnerability

VMware ESXi

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. Added to CISA KEV on 2025-03-04.

Why this severity: CVSS 8.2 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

Started: Mar 4, 2025
Closed: Mar 4, 2025
CVE: CVE-2025-22225

Follow this incident

Updated Mar 4, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

Mar 4, 2025
CISA added CVE-2025-22225 to the KEV catalog (due 2025-03-25).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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