CVE-2019-0541: Microsoft MSHTML Remote Code Execution Vulnerability

Vulnerability summary

CVE-2019-0541 is a high (CVSS 9.3) Command Injection vulnerability in Microsoft MSHTML. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 53.20% chance of exploitation in the next 30 days, higher than 98.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 08-01-2019
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVMicrosoft MSHTML Remote Code Execution Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

A remote code execution vulnerability exists in the way that the MSHTML engine inproperly validates input, aka "MSHTML Engine Remote Code Execution Vulnerability." This affects Microsoft Office, Microsoft Office Word Viewer, Internet Explorer 9, Internet Explorer 11, Microsoft Excel Viewer, Internet Explorer 10, Office 365 ProPlus.

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.