Microsoft Word Remote Code Execution Vulnerability

Description

A remote code execution vulnerability exists in Microsoft Word software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user. To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Word software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file. The security update addresses the vulnerability by correcting how Microsoft Word handles files in memory.

Scores

EPSS (exploitation in 30 days)

4.9% · top 7.9% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Weakness

• Remote Code Execution

Affected products

• Microsoft · Microsoft SharePoint Enterprise Server 2016

  • affected 16.0.0 – < publication

• Microsoft · Microsoft SharePoint Enterprise Server 2013 Service Pack 1

  • affected 15.0.0 – < publication

• Microsoft · Microsoft SharePoint Server 2019

  • affected 16.0.0 – < publication

• Microsoft · Microsoft Office 2019

  • affected 19.0.0 – < https://aka.ms/OfficeSecurityReleases

• Microsoft · Microsoft Office 2019 for Mac

  • affected 16.0.0 – < publication

• Microsoft · Office 365 ProPlus

  • affected 16.0.0 – < publication

• Microsoft · Microsoft Office Online Server

  • affected 16.0.1 – < publication

• Microsoft · Microsoft Word 2016

  • affected 16.0.1 – < publication

• Microsoft · Microsoft Office 2016 for Mac

  • affected 16.0.0 – < publication

• Microsoft · Microsoft Office 2010 Service Pack 2

  • affected 13.0.0.0 – < publication

• Microsoft · Microsoft Office Web Apps 2010 Service Pack 2

  • affected 13.0.0 – < publication

• Microsoft · Microsoft SharePoint Server 2010 Service Pack 2

  • affected 13.0.0.0 – < publication

• Microsoft · Microsoft Word 2010 Service Pack 2

  • affected 13.0.0.0 – < publication

• Microsoft · Microsoft Word 2013 Service Pack 1

  • affected 15.0.1 – < publication

• Microsoft · Microsoft Word 2013 Service Pack 1

  • affected 15.0.1 – < publication

References (2)

• Microsoft Word Remote Code Execution Vulnerability (opens in a new tab)vendor-advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1034 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2019-1034](https://trackcve.app/badge/CVE-2019-1034.svg)](https://trackcve.app/cve/CVE-2019-1034)

Record last updated 20 May 2025, 17:50 UTC.