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What is the of your project? (e.g., studying for a certification, testing old software, home lab setup) What hardware or server model are you using?
Broadcom (which acquired VMware in 2023) has moved away from the "Free ESXi" model entirely. Official free keys are no longer issued, making 5.5 keys a "found object" rather than a supported product. Why People Still Look for It VMware ESXi - endoflife.date 25 Feb 2026 —
VMware ESXi 5.5 was a cornerstone of virtualization technology, offering robust capabilities for data centers. However, managing licenses for older versions like 5.5—specifically seeking keys that unlock advanced features (often referred to in legacy documentation or forum discussions around "14k" keys, implying certain licensing tiers)—presents unique challenges in 2026.
VMware historically offered a free version of ESXi 5.5, known as the VMware vSphere Hypervisor. This free license allows users to run ESXi indefinitely on physical servers but imposes specific hardware and management limitations:
那么,“14k”指的是什么?在非官方的黑市或破解下载站中,“14k”通常是某些流传的“100% 可用”或“永久有效”的盗版 License Key 的代称或者压缩包的密码后缀。例如,一些 Weebly 博客站点会将下载标题直接标注为“Vmware Esxi 5.5 License Key 14k”,并捆绑下载链接。如果你在网络上搜索这个词,通常会发现两类结果:一是,二是 私人博客公布的序列号 。需要警惕的是,这些资源没有任何来自 Broadcom/VMware 的官方背书,存在极高的安全风险。
VMware ESXi 5.5 is a part of the vSphere 5.5 suite, which is a popular virtualization platform used for building and managing virtual machines. The licensing for VMware ESXi 5.5 and other vSphere components is based on the number of processors (CPUs) in the host servers and the type of features you need.
Understanding VMware ESXi 5.5 Licensing and Legacy Virtualization Introduction
Free core hypervisor, lacks centralized management via vCenter server. Small to mid-market infrastructure Thin provisioning, vMotion, vSphere HA, Data Protection. Enterprise Legacy large-scale deployments
Unlike hosted hypervisors, ESXi runs without an underlying operating system, maximizing performance, reducing the attack surface, and minimizing management overhead.
Click on the tab and select the Add (+) icon to input your new license key.
Since ESXi 5.5 is well past its end-of-life date, it does not receive security patches. It remains permanently vulnerable to severe exploits discovered in recent years, including ransomware variants specifically targeting hypervisor datastores. Lack of Modern Web Management