CVE-2021-38646: Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.0/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-Sep

Released

2021-09-14

EPSS Score

50.93% (percentile: 97.9%)

CISA KEV

Listed — due 2022-04-18

FAQ

Is the Preview Pane an attack vector for this vulnerability? No, the Preview Pane is not an attack vector.

Affected Products (9)

Microsoft Office

• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2019 for 64-bit editions
• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft Office 2016 (32-bit edition)
• Microsoft Office 2016 (64-bit edition)
• Microsoft Office 2013 RT Service Pack 1
• Microsoft Office 2013 Service Pack 1 (32-bit editions)
• Microsoft Office 2013 Service Pack 1 (64-bit editions)

Security Updates (4)

• 5001997
• 5001997
• 5001958
• 5001958

Acknowledgments

<a href="https://sg.linkedin.com/in/limzhiweieugene">Eugene Lim</a> with <a href="https://www.tech.gov.sg/">Government Technology Agency of Singapore</a>

Revision History

• 2021-09-14: Information published.