CVE-2021-38646

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

CVE-2021-38646 is fixed in 5 products on 1 platform, first by KB5001958, released September 14, 2021. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on March 28, 2022, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.8

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

Mar 28, 2022

Federal due date Apr 18, 2022. Known ransomware use

EPSS

0.0799

94th percentile

Where it's fixed

Product	Fix	Released
Microsoft
Microsoft Office 2013 RT Service Pack 1	KB5001958	Sep 14, 2021
Microsoft Office 2013 Service Pack 1 (32-bit editions)	KB5001958	Sep 14, 2021
Microsoft Office 2013 Service Pack 1 (64-bit editions)	KB5001958	Sep 14, 2021
Microsoft Office 2016 (32-bit edition)	KB5001997	Sep 14, 2021
Microsoft Office 2016 (64-bit edition)	KB5001997	Sep 14, 2021

Details

Published
September 14, 2021
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38646

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