Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
L L N R U H H H 7.8 .0799 94.3 YES
AFFECTED
Product Versions Fixed
Microsoft 365 Apps for Enterprise 16.0.1 – —
Microsoft Office 2013 Service Pack 1 15.0.0 – —
Microsoft Office 2016 16.0.0 – —
Microsoft Office 2019 19.0.0 – —
TIMELINE
Aug 13 Reserved by microsoft
Mar 28 Added to CISA KEV, remediation due 2022-04-18
Mar 28 Published (CNA: microsoft)
Description
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| August 13, 2021 | Reserved | Reserved by microsoft |
| March 28, 2022 | KEV ADDED | Added to CISA KEV, remediation due 2022-04-18 |
| March 28, 2022 | Published | Published (CNA: microsoft) |
Affected
Affected products and packages — 4 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Microsoft 365 Apps for Enterprise | — | 16.0.1 | — |
| Microsoft | Microsoft Office 2013 Service Pack 1 | — | 15.0.0 | — |
| Microsoft | Microsoft Office 2016 | — | 16.0.0 | — |
| Microsoft | Microsoft Office 2019 | — | 19.0.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2021-38646 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.