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CVE-2021-38646: Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability
Microsoft Office · in CISA KEV since 2022-03-28
2022-03-28added to KEV
2022-04-18federal remediation due date
7.99%EPSS exploit probability (30 days) 94.5th percentile
7.8 HIGHCVSS 3.1
Knownknown ransomware use
194days from NVD publication to KEV
What it is
Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.
Required action (CISA)
Apply updates per vendor instructions.
| CWE | — |
|---|---|
| CVSS vector | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD published | 2021-09-15 (Analyzed) |
Original records: NVD · CISA KEV · JSON: /api/cve/CVE-2021-38646.json · all KEV CVEs
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Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.
Get the full file: Exploited Vulnerabilities Brief – September 2026 ($29): this month's KEV additions ranked by EPSS, ransomware use and due date, ready to hand to a patch team. Checkout by Polar.