A remote code execution vulnerability exists in the way that the Microsoft Script Runtime handles objects in memory, aka 'Microsoft Script Runtime Remote Code Execution Vulnerability'.

A remote code execution vulnerability exists in the way that the Microsoft Script Runtime handles objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user. An attacker who successfully exploited the vulnerability could gain the same user rights as the current user. If the current user is logged on with administrative user rights, an attacker who successfully exploited the vulnerability could take control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
In a web-based attack scenario, an attacker could host a specially crafted website that is designed to exploit the vulnerability through Internet Explorer and then convince a user to view the website. An attacker could also embed an ActiveX control marked "safe for initialization" in an application or Microsoft Office document that hosts the IE rendering engine. The attacker could also take advantage of compromised websites and websites that accept or host user-provided content or advertisements. These websites could contain specially crafted content that could exploit the vulnerability.
The security update addresses the vulnerability by modifying how the Microsoft Script Runtime handles objects in memory.

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1061

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1061

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1061 Types: Patch, Vendor Advisory

[{"vendor":"Microsoft","product":"Windows","versions":[{"version":"10 Version 1803 for 32-bit Systems","status":"affected"},{"version":"10 Version 1803 for x64-based Systems","status":"affected"},{"version":"10 Version 1803 for ARM64-based Systems","status":"affected"},{"version":"10 Version 1809 for 32-bit Systems","status":"affected"},{"version":"10 Version 1809 for x64-based Systems","status":"affected"},{"version":"10 Version 1809 for ARM64-based Systems","status":"affected"},{"version":"10 Version 1709 for 32-bit Systems","status":"affected"},{"version":"10 Version 1709 for x64-based Systems","status":"affected"},{"version":"10 Version 1709 for ARM64-based Systems","status":"affected"},{"version":"10 for 32-bit Systems","status":"affected"},{"version":"10 for x64-based Systems","status":"affected"},{"version":"10 Version 1607 for 32-bit Systems","status":"affected"},{"version":"10 Version 1607 for x64-based Systems","status":"affected"},{"version":"7 for 32-bit Systems Service Pack 1","status":"affected"},{"version":"7 for x64-based Systems Service Pack 1","status":"affected"},{"version":"8.1 for 32-bit systems","status":"affected"},{"version":"8.1 for x64-based systems","status":"affected"},{"version":"RT 8.1","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server","versions":[{"version":"version 1803  (Core Installation)","status":"affected"},{"version":"2019","status":"affected"},{"version":"2019  (Core installation)","status":"affected"},{"version":"2016","status":"affected"},{"version":"2016  (Core installation)","status":"affected"},{"version":"2008 for 32-bit Systems Service Pack 2","status":"affected"},{"version":"2008 for 32-bit Systems Service Pack 2 (Core installation)","status":"affected"},{"version":"2008 for Itanium-Based Systems Service Pack 2","status":"affected"},{"version":"2008 for x64-based Systems Service Pack 2","status":"affected"},{"version":"2008 for x64-based Systems Service Pack 2 (Core installation)","status":"affected"},{"version":"2008 R2 for Itanium-Based Systems Service Pack 1","status":"affected"},{"version":"2008 R2 for x64-based Systems Service Pack 1","status":"affected"},{"version":"2008 R2 for x64-based Systems Service Pack 1 (Core installation)","status":"affected"},{"version":"2012","status":"affected"},{"version":"2012 (Core installation)","status":"affected"},{"version":"2012 R2","status":"affected"},{"version":"2012 R2 (Core installation)","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1909 for 32-bit Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1909 for x64-based Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1909 for ARM64-based Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1909 (Server Core installation)","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for 32-bit Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for x64-based Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for ARM64-based Systems","versions":[{"version":"unspecified","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1903 (Server Core installation)","versions":[{"version":"unspecified","status":"affected"}]}]

[{"vendor":"Microsoft","product":"Windows 10 Version 1507","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"10.0.10240.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1607","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"10.0.14393.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1709","platforms":["ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1709 for 32-bit Systems","platforms":["32-bit Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1803","platforms":["32-bit Systems","ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"10.0.17763.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1809","platforms":["ARM64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for 32-bit Systems","versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for ARM64-based Systems","versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1903 for x64-based Systems","versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 10 Version 1909","platforms":["32-bit Systems","ARM64-based Systems","x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 7","platforms":["32-bit Systems"],"versions":[{"version":"6.1.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 7 Service Pack 1","platforms":["x64-based Systems"],"versions":[{"version":"6.1.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows 8.1","platforms":["32-bit Systems","ARM64-based Systems","x64-based Systems"],"versions":[{"version":"6.3.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1","platforms":["x64-based Systems"],"versions":[{"version":"6.1.7601.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 R2 Service Pack 1 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"6.1.7601.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"6.0.6003.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2008 Service Pack 2 (Server Core installation)","platforms":["32-bit Systems","x64-based Systems"],"versions":[{"version":"6.0.6003.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012","platforms":["x64-based Systems"],"versions":[{"version":"6.2.9200.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"6.2.9200.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 R2","platforms":["x64-based Systems"],"versions":[{"version":"6.3.9600.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2012 R2 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"6.3.9600.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2016","platforms":["x64-based Systems"],"versions":[{"version":"10.0.14393.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2016 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.14393.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2019","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server 2019 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.17763.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1803  (Server Core Installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1903 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]},{"vendor":"Microsoft","product":"Windows Server, version 1909 (Server Core installation)","platforms":["x64-based Systems"],"versions":[{"version":"10.0.0","lessThan":"publication","versionType":"custom","status":"affected"}]}]