What’s Vulnerable › Vulnerabilities
CVE-2020-1061: Microsoft Script Runtime Remote Code Execution Vulnerability
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 3.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2020-05-21 · updated 2026-08-19
- Weakness: CWE-787
Description
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.
Affected products
- Microsoft Windows 10 Version 1607: 1607, 1709, 1803, 1809, 1903, 1909
- Microsoft Windows 7: all versions
- Microsoft Windows 8.1: all versions
- Microsoft Windows RT 8.1: all versions
- Microsoft Windows Server 2008: r2-sp1
- Microsoft Windows Server 2012: r2
- Microsoft Windows Server 2016: 1803, 1903, 1909
- Microsoft Windows Server 2019: all versions
- Microsoft Windows 10 Version 1507: from 10.0.10240.0 before publication — fixed in publication
- Microsoft Windows 10 1607: from 10.0.14393.0 before publication — fixed in publication
- Microsoft Windows 10 1709: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1709 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 1803: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10: from 10.0.17763.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for 32-bit Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for ARM64-based Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 Version 1903 for x64-based Systems: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 10 1909: from 10.0.0 before publication — fixed in publication
- Microsoft Windows 7: from 6.1.0 before publication — fixed in publication
- Microsoft Windows 7 Service Pack 1: from 6.1.0 before publication — fixed in publication
- Microsoft Windows 8.1: from 6.3.0 before publication — fixed in publication
- Microsoft Windows Server 2008 R2 Service Pack 1: from 6.1.7601.0 before publication — fixed in publication
- Microsoft Windows Server 2008 Service Pack 2: from 6.0.6003.0 before publication — fixed in publication
- Microsoft Windows Server 2012: from 6.2.9200.0 before publication — fixed in publication
- Microsoft Windows Server 2012 R2: from 6.3.9600.0 before publication — fixed in publication
- Microsoft Windows Server 2016: from 10.0.14393.0 before publication — fixed in publication
- Microsoft Windows Server 2019: from 10.0.17763.0 before publication — fixed in publication
- Microsoft Windows Server, version 1803 (Server Core Installation): from 10.0.0 before publication — fixed in publication
- Microsoft Windows Server, version 1903 (Server Core installation): from 10.0.0 before publication — fixed in publication
- Microsoft Windows Server, version 1909 (Server Core installation): from 10.0.0 before publication — fixed in publication
How to fix
Upgrade to a fixed version: Microsoft Windows 10 Version 1507 publication; Microsoft Windows 10 1607 publication; Microsoft Windows 10 1709 publication; Microsoft Windows 10 Version 1709 for 32-bit Systems publication; Microsoft Windows 10 1803 publication; Microsoft Windows 10 publication; Microsoft Windows 10 Version 1903 for 32-bit Systems publication; Microsoft Windows 10 Version 1903 for ARM64-based Systems publication; Microsoft Windows 10 Version 1903 for x64-based Systems publication; Microsoft Windows 10 1909 publication; Microsoft Windows 7 publication; Microsoft Windows 7 Service Pack 1 publication. Check the vendor advisory for mitigations.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1061
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1061
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