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CVE-2019-0541

Microsoft MSHTML Remote Code Execution

8.8 HIGHActively exploited (CISA KEV)Public exploitEPSS 53.2%
  1. Published8 Jan 2019
  2. Added to CISA KEV3 Nov 2021
  3. Remediation due3 May 2022
Actively exploited (CISA KEV)

Microsoft MSHTML engine contains an improper input validation vulnerability that allows for remote code execution vulnerability.

Added to KEV: 3 Nov 2021Federal remediation due: 3 May 2022

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Microsoft Excel Viewer2007
Microsoft Internet Explorer10 · 11 · 9
Microsoft Office2010 · 2013 · 2016 · 2019
Microsoft Office 365 Proplusall versions
Microsoft Office Word Viewerall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2019-0541 being actively exploited?

Yes. CVE-2019-0541 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Nov 2021.

How severe is CVE-2019-0541?

CVE-2019-0541 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 53.2% probability of exploitation.

Which products are affected by CVE-2019-0541?

Affected products include Microsoft Excel Viewer, Microsoft Internet Explorer, Microsoft Office, Microsoft Office 365 Proplus, Microsoft Office Word Viewer.

How do I fix CVE-2019-0541?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-0541 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.