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CVE-2021-38646

Known Exploited (CISA KEV)HIGH

7.8

CVSS Severity Score

EPSS Score37.2740%

EPSS Percentile85.43th

PublishedSep 15, 2021

Last ModifiedOct 30, 2025

Vulnerability Description

Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability

Affected Platforms (CPE)

📦

Microsoft

365 Apps

All versions

📦

Microsoft

Office

= 2013

📦

Microsoft

Office

= 2013

📦

Microsoft

Office

= 2016

📦

Microsoft

Office

= 2019

References & Advisories

🔗 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38646

🔗 https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38646

🔗 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38646

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