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High7.8Microsoft Server

High [CVE-2020-1077] Windows Runtime Elevation of Privilege Vulnerability

This high-severity Microsoft Server advisory covers CVE-2020-1077 affecting Windows Server 2016 (Server Core installation), Windows Server 2019 (Server Core installation), Windows Server, version 1803 (Server Core Installation).

CVE-2020-1077 Published May 21, 2020Updated by vendor Aug 19, 2026
CVE-2020-1077
Affected products & platforms
Microsoft ServerWindows Server
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Summary

An elevation of privilege vulnerability exists when the Windows Runtime improperly handles objects in memory. An attacker who successfully exploited this vulnerability could run arbitrary code in an elevated context.

An attacker could exploit this vulnerability by running a specially crafted application on the victim system. The update addresses the vulnerability by correcting the way the Windows Runtime handles objects in memory.

Affected products named by the advisory: Windows Server 2016; Windows Server 2016 (Server Core installation); Windows Server 2019; Windows Server 2019 (Server Core installation); and 3 more.

Affected products named by the advisory: Windows Server, version 1803 (Server Core Installation); Windows Server, version 1903 (Server Core installation); Windows Server, version 1909 (Server Core installation).

Affected versions
  • Windows 10 Version 1607 10.0.14393.0 before publication
  • Windows 10 Version 1709 10.0.0 before publication
  • Windows 10 Version 1709 for 32-bit Systems 10.0.0 before publication
  • Windows 10 Version 1803 10.0.0 before publication
  • Windows 10 Version 1809 10.0.17763.0 before publication
  • Windows 10 Version 1809 10.0.0 before publication
  • Windows 10 Version 1903 for 32-bit Systems 10.0.0 before publication
  • Windows 10 Version 1903 for ARM64-based Systems 10.0.0 before publication
  • Windows 10 Version 1903 for x64-based Systems 10.0.0 before publication
  • Windows 10 Version 1909 10.0.0 before publication
  • Windows Server 2016 10.0.14393.0 before publication
  • Windows Server 2016 (Server Core installation) 10.0.14393.0 before publication

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Fixed versions
  • publication

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • The update addresses the vulnerability by correcting the way the Windows Runtime handles objects in memory.

Official advisory · high-confidence parse· fetched 1 hour ago·verify at source

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