CVE-2021-27053: Microsoft Excel 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-Mar

Released

2021-03-09

EPSS Score

3.56% (percentile: 87.7%)

FAQ

Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector. Are the updates for the Microsoft Office 2019 for Mac currently available? The security update for Microsoft Office 2019 for Mac is not immediately available. The update will be released as soon as possible, and when it is available, customers will be notified via a revision to this CVE information.

Affected Products (13)

Microsoft Office

• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2019 for 64-bit editions
• Microsoft Office Online Server
• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft Excel 2016 (32-bit edition)
• Microsoft Excel 2016 (64-bit edition)
• Microsoft Excel 2010 Service Pack 2 (32-bit editions)
• Microsoft Excel 2010 Service Pack 2 (64-bit editions)
• Microsoft Excel 2013 RT Service Pack 1
• Microsoft Excel 2013 Service Pack 1 (32-bit editions)
• Microsoft Excel 2013 Service Pack 1 (64-bit editions)
• Microsoft Office Web Apps Server 2013 Service Pack 1

Security Updates (8)

• 4493229
• 4493233
• 4493233
• 4504707
• 4504707
• 4493239
• 4493239
• 4493234

Acknowledgments

kdot working with Trend Micro Zero Day Initiative

Revision History

• 2021-03-09: Information published.