CVE-2021-40486: Microsoft Word Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Remote Code Execution

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2021-Oct

Released

2021-10-12

EPSS Score

5.64% (percentile: 90.4%)

FAQ

Is the Preview Pane an attack vector for this vulnerability? Yes, the Preview Pane is an attack vector.

Affected Products (12)

Microsoft Office

• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Enterprise Server 2013 Service Pack 1
• Microsoft SharePoint Server 2019
• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2019 for 64-bit editions
• Microsoft Office Online Server
• Microsoft Word 2016 (32-bit edition)
• Microsoft Word 2016 (64-bit edition)
• Microsoft Office Web Apps Server 2013 Service Pack 1
• Microsoft Word 2013 RT Service Pack 1
• Microsoft Word 2013 Service Pack 1 (32-bit editions)
• Microsoft Word 2013 Service Pack 1 (64-bit editions)

Security Updates (10)

• 5002029
• 5002006
• 5001924
• 5002028
• 5002027
• 5002004
• 5002004
• 5002036
• 5001960
• 5001960

Acknowledgments

kdot working with <a href="https://www.zerodayinitiative.com/">Trend Micro Zero Day Initiative</a>

Revision History

• 2021-10-12: Information published.