---
title: VMware ESXi Vulnerability (CVE 2025 22225)
description: Exploitation of VMware ESXi vulnerability CVE-2025-22225 enables hypervisor control. Immediate patching and hardening are essential to mitigate threats.
---

[IronINTEL](https://www.irongatesecurity.com/ironintel)

# [VMware ESXi Vulnerability (CVE 2025 22225)](https://www.irongatesecurity.com/ironintel/vmware-esxi-vulnerability-cve-2025-22225)

 Written by [IronGate](https://www.irongatesecurity.com/ironintel/author/irongate) | Feb 26, 2026 9:13:52 PM

# **Summary**

 

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has confirmed that ransomware operators are actively exploiting a high‑severity VMware ESXi sandbox‑escape vulnerability, tracked as CVE‑2025‑22225. The flaw enables attackers with VMX‑level privileges to perform arbitrary kernel writes, escape VM isolation, and seize control of the underlying ESXi host.

Broadcom issued patches for this vulnerability in March 2025 as part of advisory VMSA‑2025‑0004, which also remediated two related zero‑day issues (CVE‑2025‑22224 and CVE‑2025‑22226). CISA has since added CVE‑2025‑22225 to its Known Exploited Vulnerabilities (KEV) catalog and confirmed that it is being weaponized in active ransomware campaigns. Under BOD 22‑01, federal agencies were required to remediate affected systems by March 25, 2025.

 

Affected Products

Per Broadcom’s advisory, the following VMware platforms contain impacted VMX‑related components:

- VMware ESXi
- VMware Fusion
- VMware Cloud Foundation
- VMware vSphere
- VMware Workstation
- VMware Telco Cloud Platform

Threat Summary & Environment Impact

 

Threat actors—including clusters assessed to be aligned with Chinese state operations—have been chaining CVE‑2025‑22225 with related vulnerabilities in active campaigns since at least early 2024. In practice, these exploit chains have enabled:

- Reliable full VM sandbox escape
- Hypervisor‑level compromise of ESXi hosts
- Fast, wide‑scale ransomware deployment across multiple workloads in parallel

 

Successful exploitation enables attackers to:

- Seize control of the ESXi hypervisor
- Access and manipulate all guest virtual machines
- Encrypt virtual disks and datastore structures
- Move laterally across virtualized environments
- Disrupt critical business services at scale

# **Required Actions: Prevention & Hardening**

1. Apply Broadcom Security Patches Immediately

2. Follow CISA BOD 22‑01 Guidance

3. Restrict Privileged Access

4. Harden ESXi Hosts

5. Monitor for Hypervisor‑Level Anomalies

Use EDR/XDR platforms capable of ESXi telemetry. Monitor for:

6. Enforce Network Isolation

7. Validate and Test Backups

 

# Incident Response: If Compromise is Suspected

1. Isolate the Host

2. Collect Forensic Evidence

3. Eradication

4. Restore from Known‑Good Backups

5. Post‑Incident Hardening

Bottom Line:

CVE‑2025‑22225 represents a critical threat because it enables compromise of the hypervisor itself, giving attackers the ability to control entire virtualized environments. With confirmed ransomware campaigns actively abusing this flaw, organizations running VMware ESXi must treat patching, configuration hardening, and access control around their hypervisors as an immediate, top‑priority operational requirement.

 

 

Sources:

- [Bleeping Computer](https://www.bleepingcomputer.com/news/security/cisa-vmware-esxi-flaw-now-exploited-in-ransomware-attacks/)
- [NIST.gov](https://nvd.nist.gov/vuln/detail/CVE-2025-22225)
- [CISA.gov](https://www.cisa.gov/news-events/directives/bod-22-01-reducing-significant-risk-known-exploited-vulnerabilities)

 

 

*Recent Ransomware Variants*

|  | - **Akira** - **Qilin** - **Anubis** - **DEVMAN** - **Ransom House** - **Chaos** - **Beast** - **INC** - **Inspire** - **Play** | - **Hunters** - **Lynx** - **DataLeaks** - **BlackCat** - **Cactus** - **BianLian** - **Black Basta** - **theGentlemen** - **Dragonforce** - **Nightspire** - **Sinobi** |
| --- | --- | --- |

***Recent Engagement Types***

|  | - **Ransomware w/ On-Site Restoration** - **Web Application Penetration Test** - **BEC (Transfer Fraud, Impersonation)** | - **Executive TTX** - **Web Server Compromise (SEO injection)** - **HIPAA Risk Assessment ** - **Targeted Threat Hunt for IOCs** - **Security Posture Review** |
| --- | --- | --- |

[Contact us](https://www.irongatesecurity.com/contact) today to learn more about our [Digital Forensics and Incident Response (DFIR)](https://www.irongatesecurity.com/digital-forensics-incident-response) services.

<https://www.irongatesecurity.com/hs/cta/wi/redirect?encryptedPayload=AVxigLKeg96mn5VmjIbUlm%2FdDFz3wOw1Ci%2FRC0UIcln%2Bv34Ai00Qxb%2FucVJJkjk8oDrq8XZ13hlqgtjSidLFajn0iH%2BhIYKUMsLTDodfe37DgWywE81ls%2Bm2wYIr%2BUBzX29RHPrC6cYb53fdFh14r80F7iq9tSIAwcAPrg5G0CjZurtNusM%3D&webInteractiveContentId=129984586382&portalId=43428275>

 

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