The primary source for all official ESXi 7.0 patches is the Broadcom Support Portal. Direct links are no longer static and require an authenticated session.
Even the free ESXi license allows you to download security patches. You just need to register on MyVMware. vmware esxi 70 patch download link
For most users, download the – it includes all prior fixes. The primary source for all official ESXi 7
This long-form guide provides a definitive resource: verified download links, step-by-step patching methods, critical security updates, and expert tips for managing ESXi 7.0 patches. step-by-step patching methods