CVE-2025-22225
Published: March 4, 2025
Official 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.
CISA KEV Advisory
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.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Risk Analysis
This arbitrary write vulnerability in VMware ESXi allows an attacker with VMX process privileges to trigger an arbitrary kernel write, leading to a sandbox escape. It is a high-severity flaw and is urgent due to its inclusion in CISA's KEV catalog, confirming active exploitation. The EPSS score of 0.06038 indicates a moderate likelihood of exploitation.
This vulnerability is actively exploited in the wild and is listed in CISA's KEV catalog, confirming its use by attackers.
Apply available patches and updates for VMware ESXi. Ensure that VMX processes operate with the principle of least privilege to limit potential impact.
Technical Analysis
CVE-2025-22225 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2025-22225 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2025-22225 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1