Meltdown and Spectre flaws exist in millions of modern processors built by Intel, AMD and ARM. They leave them and operating systems that run their hardware vulnerable to remote attacks that could steal data directly from the systems. Meltdown or Spectre attacks could leave encryption keys, passwords and sensitive data in open and running applications exposed to remote attackers. The only full fix comes by replacing flawed processors, which in practice would mean acquiring new systems. Fortunately, patches and workarounds for the flaw are starting to appear.”]
Source: https://www.careersinfosecurity.com/serious-meltdown-spectre-flaws-make-cpus-exploitable-a-10557