Vulnerability Intelligence Report
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CVE-2021-38646
Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.8
HIGH
Exploitability:1.9
Impact Score:5.9
EPSS Probability:4.40%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
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SSVC Action
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Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Microsoft 365 Apps for Enterprise | 16.0.1 < https://aka.ms/OfficeSecurityReleases (affected) |
| Microsoft | Microsoft Office 2013 Service Pack 1 | 15.0.0 < 5381.1000 (affected) |
| Microsoft | Microsoft Office 2016 | 16.0.0 < 5215.1000 (affected) |
| Microsoft | Microsoft Office 2019 | 19.0.0 < https://aka.ms/OfficeSecurityReleases (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2021-08-13T00:00:00 |
| Published | 2021-09-15T11:24:06 |
| Patch Date | 2021-09-14 |
| Last Updated | 2026-08-10T15:11:01 |
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