Organizations Fleeing VMware to Proxmox Are Neglecting Security Updates on New Deployments
Research finds that organizations rushing to migrate from VMware to Proxmox following Broadcom's licensing overhaul are frequently deploying stale Proxmox versions, leaving infrastructure exposed on a hypervisor that lacks active security support for older releases.
Broadcom\'s pricing overhaul following its acquisition of VMware triggered a large-scale migration of organizations to Proxmox Virtual Environment as a cost-effective alternative. However, research published by Cybernews reveals a significant and underappreciated security problem: many organizations that completed the migration are running outdated Proxmox versions and failing to apply security updates on their new infrastructure.
The Scale of the Problem
Researchers found that most Proxmox deployments are running what can be characterized as "stale" versions — ranging from Proxmox VE 8.0.3 through 8.4.13 — despite the two latest available releases being 9.0.11 and 8.4.14. Teams typically deploy the latest stable version at the time of migration but then deprioritize updates as the project is considered complete.
The concern is compounded by Proxmox\'s support lifecycle. All versions of Proxmox prior to version 8 are end-of-life, meaning they no longer receive security updates — not just for the Proxmox VE software itself but for the underlying Debian-based operating system. End-of-life operating systems accumulate untracked and unpatched vulnerabilities over time, with the risk compounding the longer the system remains without updates.
Why Migration Urgency Creates Security Risk
The pattern reflects a well-documented dynamic in IT operations: migrations undertaken under cost or deadline pressure tend to treat reaching a working state as the finish line, rather than the beginning of an ongoing maintenance cycle. Security updates on newly deployed systems are deprioritized in favor of workload stabilization and team familiarization with the new platform.
Organizations that migrated from VMware to Proxmox should immediately audit their deployed Proxmox versions, ensure all instances are running on a supported release, and establish a regular patching cadence. The infrastructure may be new, but the maintenance responsibility is not.
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