All vulnerabilities
CVE-2021-38646

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

Microsoft OfficeApplications & CMS
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 28 Mar 2022. Known ransomware useCISA KEV
Exploit odds (EPSS)7.99%Chance of exploitation activity in the next 30 days, higher than 94% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in5381.1000Also 5215.1000CVE List
Federal deadline18 Apr 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

  • 5381.1000Microsoft Office 2013 Service Pack 1CVE List
  • 5215.1000Microsoft Office 2016CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 15 Sep 2021, 11:24 UTCPublishedCVE List
  2. 28 Mar 2022Added to CISA KEVCISA KEV

Description

Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.

Text from CVE List

Affected versions 4

  • Microsoft 365 Apps for Enterpriseaffected: 16.0.1 before https://aka.ms/OfficeSecurityReleasesCVE List
  • Microsoft Office 2013 Service Pack 1affected: 15.0.0 before 5381.1000CVE List
  • Microsoft Office 2016affected: 16.0.0 before 5215.1000CVE List
  • Microsoft Office 2019affected: 19.0.0 before https://aka.ms/OfficeSecurityReleasesCVE List

References 4