CVE DATABASE / CVE-2019-0541

CVE-2019-0541

Microsoft MSHTML Remote Code Execution Vulnerability

CVSS 8.8 · HIGH ⚠ CISA KEV — ACTIVELY EXPLOITED

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2021-11-03. Federal remediation due 2022-05-03.
Required action: Apply updates per vendor instructions.

Summary

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.

CVSS 3.1 breakdown

Base score	8.8 (HIGH)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector	NETWORK
Attack complexity	LOW
Privileges required	NONE
User interaction	REQUIRED
Scope	UNCHANGED
Confidentiality	HIGH
Integrity	HIGH
Availability	HIGH

Weakness type (CWE)

CWE-77

Affected products

Microsoft internet explorerMicrosoft windows 10 1507Microsoft windows 10 1607Microsoft windows 10 1703Microsoft windows 10 1709Microsoft windows 10 1803Microsoft windows 10 1809Microsoft windows 7Microsoft windows 8.1Microsoft windows rt 8.1Microsoft windows server 2008Microsoft windows server 2012Microsoft windows server 2016Microsoft windows server 2019Microsoft excel viewerMicrosoft officeMicrosoft office 365 proplusMicrosoft office word viewer

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References

Data: NIST NVD + CISA KEV. NVD last modified 2025-10-29. Always verify against the vendor advisory before acting.