Windows 10–Window 10 Version 2004 Microcode Updates

Posted: September 2, 2020 in Windows 10
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Intel Processor(CPU) microcode update for Windows 10 Version 2004 addressing Data Sampling security vulnerabilities


  • Windows 10 Version 2004 Microcode Update were released on September 1 2020(KB4558130)
    • For specific details – see KB article – KB4558130
  • This Intel Microcode update for Windows 10 Version 2004 address 4 security vulnerabilities
    • CVE-2019-11091 – Microarchitectural Data Sampling Uncacheable Memory (MDSUM)
    • CVE-2018-12126 – Microarchitectural Store Buffer Data Sampling (MSBDS)
    • CVE-2018-12127 – Microarchitectural Load Port Data Sampling (MLPDS)
    • CVE-2018-12130 – Microarchitectural Fill Buffer Data Sampling (MFBDS)
  • Windows 10 Version 2004 Intel microcode updates with few exceptions are stand-alone updates and currently only available in the Microsoft Catalog. A few Intel processors will receive these updates via Windows Update. To determine if the microcode update will be available in Windows Update for your CPU see the KB article and reference Footnote #2. CPU’s capable of updating microcode via Windows Update are shown in the KB article with a superscripted ‘2’ in the CPU code name field(first column) in the KB table of CPU’s
    • This Microcode update includes previous released microcode updates for applicable CPU’s
    • Applicable to Windows 10 2004 and for the specific Intel CPU’s shown in the Knowledge Base article

How to Obtain:


Additional information:


Sept 01 2020: Initial Draft Date

Sept 02 2020: Original Publish Date

Sept 29 2020: Added Windows 10 Forums and Bleeping Computer reference articles under ‘Additional Information’

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