CVE-2020-1064

MSHTML Engine Remote Code Execution Vulnerability

HIGH

7.5

CVSS Score

Published: May 21, 2020 at 10:52 PM UTC

Updated: August 19, 2026 at 05:35 PM UTC

9 products affected across 1 vendorInternet ExplorerWindows Server 2016Windows Server 2019

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Severity

HIGH7.5

Exploit prediction

EPSS 3%

Description

A remote code execution vulnerability exists in the way that the MSHTML engine improperly validates input.An attacker could execute arbitrary code in the context of the current user, aka 'MSHTML Engine Remote Code Execution Vulnerability'.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Internet Explorer · Microsoft

95%

1.0.0 ≤ v < publication1.0.0 11 9

Affected range stops below publication, so it looks safe — our inference, not a vendor statement

microsoft-windows-10 (environment) · microsoft-windows-7 (environment) · microsoft-windows-8-1 (environment) · microsoft-windows-rt-8-1 (environment) · microsoft-windows-server-2008 (environment) · microsoft-windows-server-2012 (environment) · microsoft-windows-server-2016 (environment) · microsoft-windows-server-2019 (environment)

Windows 10 · Microsoftdevice

80%

All versions

Windows 7 · Microsoftdevice

80%

All versions

Windows 8-1 · Microsoftdevice

80%

All versions

Windows Rt 8-1 · Microsoftdevice

80%

All versions